Pro-Flex,LLC
Flexible Gas Piping Systems
Pro-Flex ® & Flak Jacket
Installation/Training Guide
TM
CSST
Patented System: #5,845,946, #5,857,716, & 6,102,445 other patents pending
www. ProFlexCSST.com
Phone: 877-798-6291
Fax: 765-6139
Pro-Flex,LLC
501 South State Road 341
Hillsboro, IN 47949
Version 17.1
5/2017
PRO-FLEX® CSST
Training Guide and Installation Manual
TABLE OF CONTENTS
1.0 INTRODUCTION
User Warnings, Limitations of Manual ................................................................................................1-3
Applicable Codes & Standards ...............................................................................................................3
2.0 DESCRIPTION OF SYSTEM AND COMPONENTS
System Components ...........................................................................................................................4-7
(Tubing, Fittings, Striker Plates, Pressure Regulators,
Manifolds, Shut-off Valves, Other Components)
3.0 SYSTEM CONFIGURATIONS
System Configurations.............................................................................................................................8
Series Layout & Parallel Layout (low pressure)......................................................................................9
Dual Pressure Layout ..............................................................................................................................9
Multiple Manifold Systems & Combination Steel/CSST System, Elevated Pressure System .............9-10
Determine Pressure System .................................................................................................................11
3.2 SIZING METHODS & EXAMPLES
Low Pressure System (longest length method) (example #1)..............................................................12
Medium Pressure System (example #2) ...............................................................................................12
Elevated Dual Pressure System (example #3).......................................................................................13
Combination Steel / CSST System.........................................................................................................14
4.0 INSTALLATION PRACTICES / GUIDELINES
General Installation Guidelines........................................................................................................16-17
Minimum Bend Radius .........................................................................................................................17
Support .................................................................................................................................................17
4.2 FITTING ASSEMBLY
Assembly and Re-assembly Procedures ...............................................................................................18
Tubing Cutting / End Preparation..........................................................................................................18
Minimum Tightening Torque ................................................................................................................19
4.3 ROUTING
Vertical Runs..........................................................................................................................................20
Horizontal Runs.....................................................................................................................................20
Indoor / Outdoor Issues ..................................................................................................................20-21
Clearance Holes & Notching.................................................................................................................22
Concealed Locations for Fittings..........................................................................................................23
4.4 PROTECTION
Striker Plate Requirements.............................................................................................................24-25
Spiral Metal Hose Requirements ...................................................................................................24-25
Outdoor Installations......................................................................................................................21, 26
Metal Wall Studs Installation ..............................................................................................................22
i
4.5 CONNECTIONS
Meter Hook-ups ..................................................................................................................................26-27
Fixed Appliance.....................................................................................................................................28
Moveable Appliance /Termination Outlets............................................................................................26
Pad Mounted Appliance........................................................................................................................31
Gas Fireplace Installations ....................................................................................................................30
Fire Rated Construction through Plenums and Installations within a chase.......................................20
BBQ Gas Grill – Stationary....................................................................................................................30
BBQ Gas Grill – Moveable ....................................................................................................................31
Gas Lamps.............................................................................................................................................31
CSST Buried Under Concrete Slab.........................................................................................................21
CSST Embedded in Concrete Slab .........................................................................................................21
Supporting of Conduit Embedded in Reinforced Slab...........................................................................21
Short (2 to 6 ft) Outdoor Roof Mounted Installations..........................................................................32
Long Length Outdoor Roof Mounted Installations...............................................................................32
Two Examples of Appliance Termination / Stub-out ............................................................................32
Extending Existing CSST Tubing Run .....................................................................................................23
4.7
4.8
4.9
4.10
5.0
6.0
MANIFOLD STATIONS
Allowable Locations / Configurations ...................................................................................................33
PRESSURE REGULATORS
Installation / Sizing Requirements ........................................................................................................34
Vent Limiter Option...............................................................................................................................35
Vent Line and Sizing Requirements.......................................................................................................36
Adjustments ..........................................................................................................................................36
UNDERGROUND USAGE....................................................................................................................20, 21, 26
ELECTRICAL BONDING........................................................................................................................37-38
INSPECTION / REPAIR / REPLACEMENT
Inspection and Testing of Installed CSST...............................................................................................37
Pressure Testing and Inspection Procedures ........................................................................................37
Appliance Connection Leakage Check Procedure .................................................................................38
Repair / Replacement of Damaged CSST Tubing ............................................................................39, 40
SIZING TABLES (Natural Gas and LP Gas)
Natural Gas – Low Pressure to Medium Pressure ..........................................................................41, 42
Natural Gas – Elevated Pressure ...........................................................................................................43
Natural Gas – 5 psig...............................................................................................................................44
Propane Gas ....................................................................................................................................45, 46
7.0
8.0
9.0
9.2
Iron Pipe Capacity Table ........................................................................................................................47
Referenced Data ...................................................................................................................................48
TECHNICAL DATA SPECIFICATION SHEET....................................................................................................49
CSST INSTALLATION CHECK LIST ..................................................................................................................50
DEFINITIONS OF TERMINOLOGY .................................................................................................................51
WARRANTY INFORMATION ........................................................................................................................52
QUALIFIED INSTALLER CARD ........................................................................................Inside Back Cover
ii
1.0 Introduction
Pro-Flex® CSST and Flak JacketTM Arc-Resistant CSST must be installed by a
qualified installer who meets the following criteria:
1. Installer must meet all qualifications required by the state and/or local administrative authority
[AHJ] administering the provisions of the code where the gas piping is installed.
2. An installer must also be qualified in the use of Pro-Flex® and Flak Jacket
TM
CSST. Qualification
for Pro-Flex, LLC's CSST systems can be completed by reading the Pro-Flex®, LLC's Flexible Gas
Piping System Installation/Training Guide and registering with Pro-Flex, LLC to obtain a
Qualified Installer Card by either mailing in the registration card from the back of the guide or
registering online at www.proflexcsst.com. In submitting either the printed or online
registration, you are affirming that you understand all aspects of the installation requirements
and local plumbing, mechanical, electrical, and/ or building codes applicable. If you do not
understand all requirements and local codes, contact a Qualified Installer. You must presently
possess or obtain prior to installation, a Pro-Flex® Qualified Installer Card.
The installation shall be made in accordance with local codes, or, in the absence of local codes, in
accordance with the National Fuel Gas Code [ANSI Z223.1 / NFPA 54]; Natural Gas and Propane Installation
Code [CSA B149.1]; the International Fuel Gas Code [IFGC]; the Unified Plumbing Code [UPC]; the Federal
Manufactured Home Construction and Safety Standards [24 CFR Part 3280]; or the Standard on
Manufactured Housing [NFPA 501] as applicable. In addition, the installation instructions as precribed by
Pro-Flex, LLC must be followed.
Special attention must be given to the proper design, installation, testing and use of the gas piping. Sound
engineering principles and practices must be exercised as well as diligent adherence to the proper
installation procedures. All installed systems must pass customary installation inspections by the
administrative authority prior to being placed in service.
When a conflict exists between this guide and local code requirements; the local codes shall take
precedence.
Improper installation or operation of the gas piping system may result in fire, explosion, or asphyxiation.
Only components provided or specified by Pro-Flex®, LLC as part of the fuel gas system are to be used in the
installation. Use of components from other flexible gas piping systems other than those specified as part of
the Pro-Flex® piping system is prohibited and may result in poor system performance and serious bodily
injury or property damage.
The installation instructions and practices outlined in this training guide only apply to the use of Pro-Flex®
CSST flexible gas piping systems. Pro-Flex, LLC, assumes no responsibility for installations made with other
manufacturers’ flexible gas piping systems
ANSI LC 1 ● CSA 6.26
“Fuel Gas Piping Systems Using Corrugated Stainless Steel Tubing (CSST)”
1
This standard applies to natural and propane gas piping systems using corrugated stainless steel tubing
(CSST), intended for installation in residential, commercial or industrial building including the following
components as a minimum:
a) Corrugated stainless steel tubing (CSST) [Pro-Flex® and Flak Jacket
TM
CSST]
b) Fittings for connection to the CSST
c) Striker plates and/or protective conduit to protect the installed CSST from puncture threats. Other
components of piping systems covered in this standard include gas manifolds, gas pressure
regulators. If such additional components are required to complete the gas piping installation,
they shall be either be provided as part of the piping system or specified in this Pro-Flex®, LLC
Flexible Gas Piping Systems CSST Installation/Training Guide.
• Pro-Flex® Fittings are tested for concea
• Pro-Flex
®
and Flak JacketTM CSST can be routed in most locations where traditional rigid gas
lment (subject to local code approval)
piping materials are installed:
* Inside hollow wall cavities and through walls
* Beneath or through floor and ceiling joists
* On top of ceiling joists in an attic space
* Outside of a building to gas meters and propane second stage regulators and nearby
appliances.
• Pro-Flex
®
and Flak Jacket
• Pro-Flex® and Flak Jacket
TM
CSST have been tested and listed by CSA Group for outdoor use.
TM
can be used with all fuel gases recognized in the NFPA 54 National
Fuel Gas Code up to a maximum operating pressure of 5 psi (34.5 kPa). The maximum actual
operating pressure, including transients, shall not in any case exceed 6.5 psi (44.8 kPa).
• Pro-Flex® and Flak Jacket
TM
can be used in combination with all approved fuel piping
materials for new construction and for replacing and retrofitting existing piping installations.
All Pro-Flex® mechanical joint fittings terminate in a standard NPT male or female pipe thread
which allows for attachment to valves, unions and couplings. However, Pro-Flex Fittings are
only to be used with Pro-Flex® and Flak Jacket
TM
CSST tubing. Inter-connection of tubing and
fittings with other CSST brands is prohibited!
• For underground burial and embedded in concrete, (CSST) flexible gas piping must be routed
within a non-metallic, water tight conduit. No mechanical joint fittings are permitted within
the conduit.
• Pro-Flex® and Flak Jacket
TM
may be connected directly to FIXED appliances
(subject to local code approval). Approved flexible appliance connectors must be used to
connect to a moveable gas appliance.
• When using Pro-Flex® flexible gas piping systems, precautions should be taken to ensure any
exposed tubing is not damaged or abused during building construction or reconstruction.
• Pro-Flex® and Flak Jacket
TM
shall not be routed into any firebox that is vented through the
roof of the structure.
Pro-Flex, LLC
877-798-6291
Hillsboro, IN 47949
ProFlexTech@ProFlexCSST.com
2
User Warnings
The installation of Pro-Flex
Stainless Steel Tubing (CSST) must be performed by a qualified
installer who has been trained in the use of the Pro-Flex®, LLC
system. The installer must also meet all qualifications required
by the state and/or local administrative authority administering
the provision of the code where gas piping is installed.
This Installation/Training Guide provides the user with a
general guidance when designing and installing fuel gas piping
systems using Pro-Flex® and Flak JacketTM CSST gas piping.
This guideline must be used in conjunction with all local
building codes. Local requirements will take precedence in the
event there is a conflict between the guideline and the local
codes. The installation shall be made in accordance with local
codes, or, in the absence of local codes, in accordance with
National Fuel Gas Code, ANSI Z223.1/NFPA 54, Natural Gas and
Propane Installation Code, CSA B149.1 & B149.2 in Canada, the
International Fuel Gas Code, the Federal Manufactured Home
Construction and Safety Standard, 24 CFR Part 3280, the
Manufactured Housing Construction and Safety Standards, ICC/
ANSI 2.0, or the Standard on Manufactured Housing, NFPA 501,
as applicable.
Special attention must be given to the proper design,
installation, testing and use of the gas piping system. Sound
engineering principles and practices must be exercised, as well
as diligent adherence to the proper installation procedures. All
installed systems must pass customary installation inspections
by the administrative authority prior to being placed in
service.
®
and Flak JacketTM Corrugated
Applicable Codes & Standards
Standards:
• ANSI LC1 / CSA 6.26 Standard for
“Fuel Gas Piping Systems Using Corrugated Stainless
Steel Tubing (CSST).”
Listings:
• CSA – CSA Group
Certificate of Compliance #1174673
• IAPMO – International Association of Plumbing &
Mechanical Officials - File #3669
Code Compliances:
• NFPA 54 /ANSI Z223.1 - National Fuel Gas Code
• ICC - International Fuel Gas Code
• ICC - International Mechanical Code
• ICC - International Building Code
• IAPMO - Uniform Plumbing Code
• IAPMO - Uniform Mechanical code
• National Standard of Canada
Natural Gas & Propane Installation Codes,
CAN/CGA-B149.1
WARNING!
Improper installation or operation of the system may result
in fire, explosion or asphyxiation. Only the components
provided or specified by Pro-Flex, LLC, for use as part of the
fuel gas system are to be used in the installation. Use of
components from other flexible gas piping systems other
than those specified as part of the Pro-Flex system is
prohibited and may result in poor performance and serious
bodily injury or property damage.
copyright 1996, 1998, 1999, 2001, 2002, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2017
by Pro-Flex, LLC
all rights reserved
Limitations of this Guide
While every effort has been made to prepare this document in
accordance with all regional model codes in effect at its
printing, Pro-Flex, LLC, cannot guarantee that the local
administrative authority will accept the most recent version of
these codes. It is the ultimate responsibility of the qualified
installer to determine suitability and acceptance of any building
components including gas piping. Pro-Flex, LLC, manufacturer
of Pro-Flex® and Flak JacketTM flexible gas piping systems
assumes no responsibility for labor or material for
installations made without prior determination of local code
authority acceptance.
3
2.0 Description of System and Components
Pro-Flex Gas Piping Systems bear the following Patents:
#5,845,946; # 5,857,716; and 6,102,445 - other patents pending.
Yellow Jacket
TM
CSST, is designed to convey all Natural and LP Gases throughout the structure and nearby outdoor appliances. All tubing is clearly
marked with the following: Brand Name, Part Number, Maximum Gas Pressure Rating [5 psi], EHD, the Standard listed to, Listing
Marks, the words Fuel Gas, and "foot marks".
4
0
T
0
0
T
3" X 7"
5
Additional Items approved as Part of the Pro-Flex® Flexible Piping System
6
7
3.0 System Configuration & Sizing
Configuration & Sizing
Prior to piping installation, refer to building
plans or prepare a sketch showing the
location of the appliances, the various
appliance load demands, point of delivery
(location of gas meter or second stage LP
regulator), and possible piping routes.
Appliance load demand data can be obtained
from the manufacturers name-plate located
on each appliance, or provided to the system
designer by the builder/contractor.
a) Determine the local piping
restrictions prior to installing the
flexible gas piping. Confirm that the
local administrative authority has
accepted the use of flexible gas
piping. Corrugated Stainless Steel
Tubing has been accepted by most
major code bodies, but local or
state adoption of these codes often
lags behind. Check with the local
administrative authority.
b) Determine metered (supply) pressure.
Natural Gas: [Check with the local gas utility to determine the pressure supplied by the meter.]
• Standard low-pressure supply throughout the USA and Canada is typically 6-7 inches water
column (also designated as 1/4 PSI or 4 ounces).
• Higher pressure supply such as 14 inches w.c. (1/2 PSI) and 2 PSI provide significant CSST size
reduction. Check with the local gas utility for the availability of elevated pressure.
Propane (Liquefied Petroleum Gas): [Check with the propane supplier to determine the pressure supplied]
• LP is typically supplied within residential buildings at 11 inches w.c. This pressure is set at the second
stage regulator.
• Elevated pressure settings from 14 inches w.c. to 2 PSI and 5 PSI also provide CSST size reductions.
Check with the propane gas supplier for available pressure.
c) Determine the total capacity needed for all appliances. CFH/BTUH equivalents for natural gas or
propane flow can be obtained from the local gas utility or propane supplier. The capacity tables within
this guide or any approved CSST tables should be used to determine pipe sizing needed to meet BTUH
input load requirements.
• For natural gas with a specific gravity of 0.60, one cubic foot per hour (1 CFH) is approximately
1,000 BTUH.
• For propane gas with a specific gravity 1.52, one cubic foot per hour (1 CFH) is approximately 2,500
BTUH.
8
3.1.a Series and Parallel (Low Pressure) Systems
DETERMINE TOTAL CAPACITY NEEDED FOR APPLIANCES.
Data can be obtained from the manufacturers nameplate located on the gas appliance. BTU equivalents for
CFH can be obtained from the local utility. In most cases, one Cubic Foot per Hour (1 CFH) is estimated to be
1,000 BTUH heating value (natural gas) and Propane has a heating value around 2,500 BTUH, making the
capacity tables easy to utilize with appliance BTU input loads.
DETERMINE THE TYPE OF PIPING LAYOUT WHICH BEST FITS THE INSTALLATION
SERIES SYSTEMS
A series layout is the most common arrangement
utilized for rigid pipe systems for low pressure.
These usually consist of a main run (header) with
tees branching off to each appliance. In a traditional
series system, the service pressure down stream of
the meter is typically less than 1/2 PSI.
The minimum pressure supplied to any given appliance is an important consideration. To operate properly, most Natural Gas appliances require a mini-
mum of 4”WC pressure and most Propane
(Liquefied Petroleum) appliances require a minimum of 10”WC pressure. Allowable pressure drop
along any particular run may be dictated by local
code restrictions.
PARALLEL SYSTEMS
In a parallel system, appliances are serviced by
individual runs that stem off from a central distribution manifold. A main run from the meter supplies
the manifold. The manifold station is located close to
the greatest load, typically the boiler or furnace. A
parallel layout is most likely to be used in 1/4 to 1/2
psi systems.
3.1.b Dual Pressure Systems
A dual pressure system incorporates two operating
pressures downstream from the meter. The first
pressure, set by the service regulator at the meter, is
usually 2 psi, but can be higher or lower depending on
code restrictions and gas company policy. This part of the
system is sized separately and ends at the pounds-toinches regulator inlet. The allowable pressure loss for
this part of the system must be added to the effect of
the regulator to determine the available pressure at the
regulator outlet. See chart page 36, Regulator Capacity
Table.
The second pressure, at the outlet of the pounds-toinches regulator is under 1/2 PSI, usually 8”WC for
natural gas and 11”WC for propane. Generally, a parallel
system requires a higher total footage of smaller
diameter tubing and fewer fittings compared to a series
layout.
MULTI-UNIT APARTMENT BUILDING
9
Multiple Manifold Systems
For those installations in which the energy load demand is large or the appliances are installed throughout
the structure with long distances from the meter, a multiple manifold system may be used. Elevated pressure
systems are a safe, efficient method of providing for larger BTU load demands while maintaining smaller pipe
diameters.
MULTIPLE MANIFOLD SYSTEMS
Combination Steel/CSST System (Hybrid)
In a hybrid system, corrugated stainless steel tubing is used in combination with rigid pipe or copper tubing. In lower pressure systems it is often
advantageous to use both CSST and rigid pipe to
help minimize pressure drops typically encountered
on systems with high loads and/or long runs.
Pro-Flex® Flexible Gas Piping systems [both Pro-Flex® & l k
Flak JacketTM] are approved for use in combination with all approved
fuel gas-piping materials by using approved pipe threads at the
interface.
Elevated Pressure System
In a complete elevated pressure system, corrugated
stainless steel tubing is used to deliver pressures in
excess of 1/2 psi to a pounds-to-inches regulator
positioned directly in front of each appliance
regulator. This is an alternate method of installation
used to minimize pressure drops typically
encountered on systems with high loads and/or long
runs.
HYBRID SYSTEM
ELEVATED PRESSURE SYSTEM
10
ALLOWABLE PRESSURE DROP:
Pro-Flex® gas piping systems [both Pro-Flex® CSST and Flak JacketTM] are required to be “tested, listed and
installed" in accordance with the ANSI/CSA standard for fuel gas piping systems using corrugated stainless steel
tubing, ANSI LC-1/ CSA 6.26. This standard, among other things, requires the manufacturer to provide installation
instructions including the necessary pipe sizing tables and methods.
With respect to gas piping sizing, the intent of all model codes is to ensure there is sufficient gas volume and
gas pressure supplied to the appliance for proper operation. Language from the International Fuel Gas Code clearly
illustrates this point.
“Allowable pressure drop - The design pressure loss on any piping system under maximum probable flow conditions,
from point of delivery to the inlet connection of the equipment, shall be such that the supply pressure at the
equipment is greater than the minimum pressure required for proper equipment operation.”
Natural gas appliances are typically designed to operate with a minimum inlet pressure of 4.0 inches water
column. Propane appliances are typically designed to operate with a minimum inlet pressure of 10.0 inches water column.
The natural gas capacity tables published by Pro-Flex, LLC, for use with Pro-Flex® and Flak JacketTM CSST, shall be used
to provide for no less than 5” water column pressure to the appliance inlet. The propane capacity tables shall be used to
provide no less than 10.5” water column pressure to the appliance inlet.
This can be done by subtracting the desired appliance inlet pressure (5” WC for NG, 10.5” WC for LPG) from the
gas source pressure (gas meter for NG, second stage regulator for LPG) to get allowable pressure drop. Use the
Pro-Flex® capacity table labeled with the appropriate allowable pressure drop and gas type. This will result in an
additional pressure drop capacity over the commonly used 1/2” WC drop associated with the Longest Run
Method.
Allowable Pressure Drop along any particular run may be dictated by local codes.
Reference Data for Proper System Sizing:
PRESSURE CONVERSION FACTORS FUEL GAS INFORMATION
1/4 psi = 6.921 in w.c. = (approx. 7” WC) Natural Gas Propane
1/2 psi = 13.842 in w.c. = (approx. 14” WC) BTU per Cubic Foot = 1000 2516
1 psi = 27.684 in w.c. = (approx. 28” WC)
2 psi = 55.368 in w.c. = (approx. 56” WC)
5 psi = 138.42 in w.c. = (approx. 140” WC)
Specific Gravity =
Note: to determine the CFH of Natural Gas,
divide by BTU load by 1000. To determine the
CFH of Propane, divide the BTU by 2516
0.60 1.52
11
3.2 Sizing Methods and Examples
SIZING PROCEDURES FLAK JACKETTM & PRO-FLEX® CSST, FLEXIBLE GAS TUBING
LONGEST LENGTH METHOD EXAMPLE #1
This is a low-pressure series system with four natural gas appliances. The utility company
supply pressure exiting the meter is 6 inches water column, and the maximum allowable
pressure drop across the longest length from the meter to the farthest appliance is 1/2 inch
water column. The gas supplied has a specified gravity of .60 and an energy content of 1 cubic
foot per hour equals 1,000 BTU per hour.
APPLIANCE LOADS +GAS LOAD LENGTH OF RUN
FURNACE 75 CFH (75,000 BTUH/1000 PER CFH) 14 FEET
OVEN/RANGE 45 CFH (45,000 BTUH/1000 PER CFH) 20 FEET
DRYER 25 CFH (25,000 BTUH/1000 PER CFH) 38 FEET
ATER HEATER 24 CFH (24.000 BTUH/1000 PER CFH) 50 FEET
W
TOTAL..................................................169 CFH
LENGTH OF EACH RUN
A = 8 FEET EXAMPLE:
B = 10 FEET Furnace: A (8 ft) + F (6 ft) = 14 FEET
C = 12 FEET Oven/Range: A (8 ft) + B (10 ft) + E (2 ft) = 20 FEET
D = 20 FEET Dryer: A (8 ft) + B (10 ft) + C (12 ft) + G (8 ft) = 38 FEET
E = 2 FEET Water Heater: A (8 ft) + B (10 ft) + C (12 ft) + D (20 ft) = 50 FEET
F = 6 FEET THE LONGEST RUN IS FROM THE METER TO THE WATER HEATER; OVER 50 FEET.
G = 8 FEET
SIZING SECTION A:
Length A must be sized to handle the total load of all appliances and the total pressure drop from the meter to the farthest appliance. The total
appliance load is 169 CFH. Using the longest length sizing method, the length is 50 ft. to the water heater. Referring to Table 1, (6" WC inlet
pressure and 1/2" WC pressure drop) under the 50 ft. length column, we find that 1 inch size has the flow capacity exceeding 169 CFH (171 CFH).
Use 1" tubing to run Section A.
SIZING SECTION B:
Section B must supply the water heater, dryer and range. The total pressure drop for the system is considered to be from the meter to the water
heater (farthest appliance). The total appliance load is 24+25+45 = 94 CFH. Using the longest length sizing method, the length is 50 ft. (distance
from meter to water heater). Referring to Table 1 under the 50 ft. length column, we find that size 1 inch has flow capacity over 94 CFH (171 CFH).
Use 1" tubing to run Section B.
SIZING SECTION C:
Section C must supply the water heater and dryer. The total appliance load is 24+25 = 49 CFH. Using the longest length method, the length is 50
ft. Referring to Table 1 under the 50 ft. length column, we find that 3/4 inch has flow capacity above the 49 CFH (89 CFH) Use 3/4" tubing to run
Section C.
SIZING SECTION D:
Section D must supply the water heater. The total appliance load is 24 CFH. Using the longest method, the length is 50 ft. Referring to Table 1
under the 50 ft. length column, we find that 1/2 inch has flow capacity above 24 CFH (32 CFH). Use 1/2" tubing to run Section D.
SIZING SECTION E:
The total appliance load is 45 CFH. Using the longest length method, the length is 50 ft. Referring to Table 1 under 50 ft. length column, we find
that 3/4" has flow capacity above 45 CFH (89 CFH) Use 3/4" tubing to run Section E.
SIZING SECTION F:
The total appliance load is 75 CFH. Using the longest length method, the length is 50 ft. Referring to Table 1 under 50 ft. length column, we find
that 3/4" has flow capacity above 75 CFH (89 CFH) Use 3/4" tubing to run Section F.
SIZING SECTION G:
The total appliance load is 25 CFH. Using the longest length method, the length is 50 ft. Referring to Table 1 under 50 ft. length column, we find
that 1/2" has flow capacity above 25 CFH (32 CFH) Use 1/2" tubing to run Section G.
12
EXAMPLE #2, MEDIUM PRESSURE PARALLEL SYSTEM
This is a medium-pressure parallel system which includes a
distribution tee manifold. The natural gas supply pressure is 1/2 psig
and the maximum allowable pressure drop from the meter to the
farthest appliance is 6" WC.
Appliance
Loads Lengths size
Medium Pressure (1/2 psig) Natural Gas (Parallel System)
Oven/Range 45 CFH B= 20 FT 3/8"
Furnace = 75 CFH C = 5 FT 3/8"
Dryer = 25 CFH D = 35 FT 3/8"
Water Heater = 24CFH E = 50 FT 3/8"
TOTAL CFH.... 169 CFH
A = 10 FT 3/4"
SIZING, SECTION A:
Determine distance from the meter to the farthest appliance (water heater 60 ft.) Determine the total appliance
load supply by Section A (169 CFH). Referring to Table 4 under the 60 ft. length column, we find 3/4 inch has flow
capacity above 169 CFH (274 CFH). Use 3/4" tubing to run Section A.
SIZING SECTION B:
Section B supplies the oven/range. The total pressure drop is considered from the meter to the oven/range. The
total appliance load is 45 CFH and the length is 10 ft + 20 ft. = 30 feet total. Referring to Table 4 under the 30 ft.
length col-umn, we find that 3/8 inch has a flow capacity above 45 CFH (94 CFH). Use 3/8" tubing to run Section B.
SIZING SECTION C:
Section C supplies the furnace. The total appliance load is 75 CFH and the total length is 10 ft. + 5 ft. = 15 ft total.
Referring to Table 4 under the 15 ft. length column. We find that 3/8 inch has a flow capacity above
75 CFH (134 CFH) Use 3/8" tubing to run Section C.
SIZING SECTION D:
Section D supplies the dryer. The total appliance load is 25 CFH and the total length from the meter is
10 ft. + 35 ft. = 45 feet total. Referring to Table 4 under the 45 ft. length column. Since 45 ft. does not appear in the
table, use the next longest run column of 50 ft. We find that 3/8 inch has a flow capacity above 25 CFH (73 CFH)
Use 3/8” tubing to run Section D.
SIZING SECTION E:
Section E supplies the water heater. The total appliance load is 24 CFH and the total length from the meter to
appliance is 10 ft + 50 ft = 60 feet total. Referring to Table 4 under the 60 ft. length column, we find that 3/8 inch
has a flow capacity above 24 CFH (65 CFH) Use 3/8" tubing to run Section E.
13
EXAMPLE #3 - ELEVATED DUAL PRESSURE SYSTEM
This is a 2 psig supply pressure parallel arrangement. The natural gas
system incorporates a pressure reducing regulator with a
distribution tee manifold located closely to several large capacity
appliances. The inlet pressure downstream of the meter is 2 psig,
and the designated maximum pressure drop from the meter to the
reducing regulator is 1.0 psig. The outlet pressure from the
regulator is set at 8 inches water column. A 3" WC pressure drop is
used in sizing the tubing from the regulator outlet to each
appliance. Specific gravity of the gas delivered is .60 and energy
content is 1 CFH = 1,000 BTUH.
Elevated (2 psig) Dual Pressure Natural Gas (Parallel System)
Total load and regulator size:
Calculate the total appliance load and determine if
one regulator has sufficient capacity to supply this
load. One regulator is normally adequate when
appliances are close together. When groups of
high-load appliances are widely separated, it is
often more economical to use one pressure
reducing regulator to supply each appliance group.
The total appliance load required is 169 CFH
(169,000 BTUH).
The supply pressure from the meter is 2
psig and the designated pressure drop from the
meter to the regulator is 1 psig; thus the
minimum inlet pressure to the regulator is 1 psig. Since the outlet pressure of the regulator is set at 8" WC, the expected pressure drop
across the regulator is 20 inches WC (1 psig - 8" WC = 20" WC). A single 325-3 regulator has a flow rate capacity of 252 CFH. This capacity
exceeds the system requirement of 169 CFH. In cases where the 325-3 regulator capacity is insufficient, a larger #325-5A regulator or parallel
arrangement of two regulators should be used.
APPLIANCE LOADS LENGTHS TUBE SIZE
METER TO REGULATOR A= 10 FEET 3/8"
OVEN/RANGE = 45 CFH B = 20 FEET 3/8"
FURNACE = 75 CFH C = 5 FEET 3/8"
DRYER = 25 CFH D = 35 FEET 3/8"
WATER HEATER=24 CFH E = 50 FEET 3/8"
TOTAL...........................................169 CFH
SIZING SECTION A (METER TO REGULATOR):
Section A must be sized to handle all appliances loads and supply the pressure reducing (pounds to inches) regulator. The total load is 169
CFH and the length is 10 ft. The supply pressure is 2 psig and the pressure drop is 1 psig. Referring to Table 5 (meter to regulator with 2 psig
inlet and 1 psig drop) under the 10 ft. column, we find that 3/8 inch has capacity over 169 CFH (332 CFH). Use 3/8" tubing to run Section A.
To size the other sections, the pressure source is the outlet of the pressure regulator rather than the meter. Use the low-pressure Table 3
(8.0" WC inlet with 3.0" WC drop) and size each section individually using the appliance load and run distance.
SIZING SECTION B
Section B supplies the oven/range. The load is 45 CFH and the distance between the regulator outlet and appliance is 20 ft. The total pressure
drop is from the outlet of the reducing regulator to the oven/range. The outlet pressure from the regulator is 8" WC and the pressure drop is
3" WC. Referring to Table 3, under the 20 ft. length column, we find that an 8 inch has a flow capacity above 45 CFH (81 CFH). Use 3/8" tubing
to run Section B.
SIZING SECTION C:
Section C supplies the furnace. The load is 75 CFH and the distance is 5 ft. Referring to Table 3, under the 5 ft. length column, we find that 3/8
inch has a flow capacity above 75 CFH (162 CFH). Use 3/8" tubing to run Section C.
SIZING SECTION D:
Section D supplies the dryer. The load is 25 CFH and the distance is 35 ft. Referring to Table 3, and since a 35 ft. length column does not exist,
use the 40 ft. length column. We find that 318 inch has a flow capacity above 25 CFH (58 CFH). Use 3/8" tubing to run Section D.
SIZING SECTION E:
Section E supplies the water heater. The load is 24 CFH and the distance is 50 ft. Referring to Table 3, under the 50 ft. length column, we find
that 3/8 inch has a flow capacity above 24 CFH (51 CFH). Use 3/8" tubing to run Section E.
14
COMBINATION STEEL/ CSST (Hybrid System)
(Hybrid system)
It is often to your advantage to use
both CSST and rigid pipe to help
minimize pressure drops typically
encountered on systems with high
loads and/or long runs. Flexible gas
piping systems by Pro-Flex, LLC [both
Pro-Flex®CSST and Flak JacketTM] are
approved for use in combinations
with approved gas piping materials
by using approved pipe threads at
the interface. For sizing use longest
run method assuming the complete
run is CSST.
15
4.0 Installation Practices
4.1 General Installation Practices
• Pro-Flex® flexible gas piping systems [both Pro-Flex® CSST and Flak JacketTM] may only be installed by a Qualified/
Trained installer who has been trained in the use of Pro-Flex®. A Pro-Flex® /Flak JacketTM Qualified installer card is
required to purchase and install Pro-Flex®'s flexible gas piping.
• Only the components provided or specified by Pro-Flex, LLC, (including Pro-Flex's striker plates and floppy flex
armor conduit) are to be used as part of the piping system in the installation. Tubing or fittings from other
manufacturer' CSST systems shall not be intermingled with Pro-Flex® tubing [Flak JacketTM or Pro-Flex® CSST] or
fittings.
• Never use Pro-Flex® flexible gas piping or components as a ground electrode or as a grounding path for appliances
or electrical systems.
• Pro-Flex® flexible gas piping systems [both Pro-Flex® CSST and Flak JacketTM] routed in a location which is concealed,
constrained, and within 3 inches of a potential threat will be protected against damage by protection devices listed
in the Pro-Flex® Installation/Training Guide. The extent of protection is defined as follows:
a. At all points of penetration less than 2 inches [50.8mm] from any edge of a stud, joist, plate, etc., a striker plate is
required to provide protection at the area of support and within 5 inches [127mm] of each side [if appropriate] of
the support.
b. At points of penetration 2 to 3 inches [50.8 - 76.2mm] from any edge of a stud, joist, plate, etc., a striker plate is
required to provide protection throughout the area of support.
c. At points of penetration greater than 3 inches [76.2mm] from any stud, joist, plate, etc., no protection is required.
d. Tubing routed horizontally through studs shall be protected from puncture threats using shielding devices
provided.
Piping that is constrained by rigid foam insulation shall be protected along it's entire length. In addition, any
exposed stainless that may come in contact with spray foam insulation must be wrapped with self sealing silicone
tape.
• CSST greater than 1 inch [25.4mm] inside diameter installed within hollow wall cavities of 2 x 4 construction shall be
protected along the entire concealed length using the shielding devices specified by the manufacturer.
• The width of the installed striker plate, at the point of penetration through studs, joists, plates, etc., shall be at least 1.5
times the outside diameter of the tubing.
• Open ends of the tubing are to be temporarily plugged or taped closed prior to installation to prevent the entrance of
dirt or other debris.
• Contact with sharp objects and harmful substances are to be avoided. The protective jacket should be kept in place as
much as possible to protect the tubing from corrosive threats. Contact with chemicals containing chlorides or ammonia
[ these chemicals include leak test solutions, fluxes used to solder copper tubing, and acid based cleaners used to wash
masonry] must be followed by a thorough rinse with water and wipe dry.
• Installation clearance holes for routing CSST are to be approximately 1/2" larger than the outside diameter of the CSST
[see Table 4.1]. Drilling of any structural member must be in conformance with local building codes.
• CSST tubing shall be supported with pipe straps, bands or hangers suitable for the size and weight of the tubing, at
intervals not to exceed those shown in Table 4.2. When supporting CSST tubing runs, the use of other conductive
systems such as vents, ducting, piping and cables [electrical or communication] are prohibited.
• Recommended Minimum Bend Radius for CSST [ see Table 4.3].
Table 4.1
Table 4.2
Table 4.3
16
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Connections to moveable appliances such as ranges and clothes dryers should be accomplished with a
“flexible gas appliance connector.”
• Regulators are suitable for multi-poise mounting. When using a vent limiting device, the regulator must be
mounted in a horizontal upright position. For outdoor venting, the vent line must be at least the same size as
the vent connection and no longer than 30 feet before upsizing. When mounting a regulator outdoors,
remove the vent limiting device and position regulator inverted with open port down.
• A manifold assembly utilizing a pounds-to-inches regulator shall include a shut-off valve ahead of the
regulator and installed in an accessible location so that the regulator can be inspected, maintained and
serviced if necessary.
• Buried or Embedded: CSST shall not be buried directly in the ground or directly embedded in concrete (i.e.:
patio slabs, foundations and walkways) When it is necessary to bury or embed CSST, the tubing shall be
routed inside a non-metallic, watertight conduit that has an inside diameter at least 1/2 inch greater than the
O.D. of the CSST tubing. For ends of conduit installed outdoors, the conduit shall be sealed at any exposed
end to prevent water form entering. No mechanical joint fittings are permitted within the conduit. Note: CSST
must be buried in accordance with all local building codes.
• Pro-Flex® flexible gas piping systems [Flak JacketTM and Pro-Flex® CSST] must be pressure tested for leaks
during rough construction in accordance with all local codes. In the absence of local requirements, test in
accordance with Part 4 of the NFPA 54, National Fuel Gas Code ANSI Z223.1 and/or CSA B149.1 Installation
Codes or in accordance with the requirements of the applicable local codes. For a ‘one-part’ pressure-test,
the regulator shall be removed from the system. For a ‘two-part’ test, the regulator should be isolated from
downstream test pressures.
• Alongside a structure: When installed alongside a structure, between the ground and a height of 6 feet, in an
exposed condition, the CSST shall be protected from mechanical damage inside a conduit or chase. A conduit
or chase is not required if the tubing is installed in a location that will not subject the tubing to mechanical
damage.
• Meter Hook-Ups. Refer to the Pro-Flex® installations and illustrations shown in this training guide. CSST shall
not be used as a means of support for the gas meter. Also check with your local code official or authority
having jurisdiction on meter hook-ups. Some restrictions may apply. Local code requirements will always take
precedence.
• For a Piping system which includes manual gas valves listed as complying with ASME B16.44. Manually
operated metallic gas valves for use in above ground piping systems up to 5 psi. An approved valve must be
used.
• Pro-Flex® Flexible Gas Piping (Flak JacketTM or Pro-Flex® CSST) shall not be directly routed into a metallic
gas appliance enclosure that penetrates the roof-line. The connection shall be outside of the enclosure to a
section of rigid pipe or stub-out. In instances where the appliance is not vented above the roof-line, such as
decorative fireplaces, the CSST tubing must be protected by grommets, bushing or armor (Floppy-Flex) tape
tape, shrink sleeve material or a minimum of four (4) wraps of #10 Mil Duct-Tape. This is to ensure that no
physical contact will be made between will be made between the metal and the CSST tubing that could cause
mechanical wear.
• Pro-Flex, LLC requires direct bonding for Pro-Flex® [yellow] CSST in accordance with NFPA 54 Section 7.13.
Pro-Flex, LLC has no additional bonding requirements for Flak Jacket
TM
Arc-Resistant CSST [ it must be
bonded in the same manner as rigid pipe per NFPA 70 Article 250.104 (B)]. However, installers must always
comply with any local requirements which may be more strict than these instructions. See section 4.10 of
this guide for detailed bonding instructions.
17
4.2 Fitting Assembly
ASSEMBLY PROCEDURES FOR PRO-FLEX® & FLAK JACKETTM CSST
STEP #1:
Secure NPT end of the fitting to the fixed connection. Use
appropriate sealant on the NPT threads.
STEP #2:
Using a utility knife or scissor-style plastic pipe cutter, cut
through the coating [around the entire circumference of
the jacket] in the fourth [4th] valley and remove jacket
from the tubing end. Note: Carefully cut jacket material
only.
STEP #3
Slide nut over CSST tubing with threaded end pointing
toward cut end of tubing.
STEP #4
By hand, open Retainer Ring [split stainless steel] wide
enough to fit in the fourth [4th] valley and squeeze ring by
hand to close. Do not break the retainer ring in half.
STEP #5
Place Slide [solid stainless steel] Ring over the tube end
and slide it down to the Retainer Ring.
STEP #6
Roll Silicone O-Ring [red/orange] over tube end and roll/
slide it down to meet the slider ring.
STEP #7
Ensure the high temperature gasket [brown] is in
place in the base of the fitting.
Patented System #5,845,946; #5,857,718;
6,102,445
Jacket cut and removed
inside the 4th valley
from the end of the
tube.
STEP #8
Place tube into fitting end. Tighten nut hand tight,
then tighten nut additional 1/4 to 1/2 turn with a
pair of wrenches. Do not use thread sealant on the
threads where the nut threads onto fitting.
18
TM
Arc-Resistant
When installing Flak Jacket
CSST, any exposed stainless steel must be
covered by wrapping with self-bonding
silicone tape [such as PFRT-50P]
1. Polyethylene Jacket [Yellow or Black]
2. 304 Stainless Steel Corrugated Tubing
3. Brass Mechanical Nut
4. Brass Mechanical Fitting
5. Silicone O-Ring [orange/red]
6. 304 Stainless Steel Slide Ring [solid]
7. 304 Stainless Steel Slide Ring [split]
8. High Temperature Gasket [brown]
Proper Cutting of Flak JacketTM and Pro-Flex® CSST
• CSST is to be cut with a tubing cutter. The cut is to be made in a valley between
corrugations. Use light pressure [too much pressure may deform the tube where it is
being cut] and multiple revolutions, tighten the cutter approximately 1/4 turn per
revolution. The cut is to be free of burrs and distortions.
• After the tubing has been cut, trim the jacket . Use a sharp utility knife or scissors-
style plastic tubing cutter with the blade positioned in the 4th valley; cut around the
diameter of the tube and remove the small piece of the jacket.
Trouble Shooting / Re-assembling a Mechanical Fitting
CORRECTING LEAKS...
1. Gradually tighten fitting until leak stops
2. If tightening does not stop after reaching maximum torque of 35 lbs or 50 lbs [refer to maximum
torque for each size listed below].
STOP and open assembly and
check...
a. To see if they are properly assembled. If not correct, go through assembly steps and test
again for leaks.
b. Check to see that no foreign material is in assembly. If so, clean out and re-assemble and
test again for leaks.
c. Check to see that none of the assembly pieces are cracked. If so, replace, re-assemble and
test again for leaks.
d. Ensure use of Pipe tape or Pipe Dope on NPT Threaded Ends.
How to Disassemble a Pro-Flex Mechanical Fitting:
a. Remove nut
b. Remove Retainer Ring first, then Slide Ring, then O-ring.
c. Replace any damaged component.
d. Re-Assemble per instructions on page 18.
Maximum Allowable Nut Tightening Torques for
Connecting Fittings to Corrugated Stainless Steel
Size of Fitting
3/8" (10mm)
1/2" (15mm) 35 ft.-lb.
3/4" (20mm) 50 ft.-lb.
1" (25mm)
11/4" (31mm)
Tubing
Maximum Allowable Tightening Torque
35 ft.-lb.
50 ft.-lb.
50 ft.-lb.
TORQUING METHOD FOR FIELD ASSEMBLY
To achieve the proper Torque without a torque
wrench, first tighten the fitting adapter to the nut
until resistance to hand tightening is so that you can
no longer continue. Then, using a crescent wrench,
tighten to 1/4 to 1/2 turn.
CAUTION: DO NOT OVER TIGHTEN!
19
4.3 Routing
• Flexible gas piping systems manufactured by Pro-Flex, LLC [both Flak JacketTM & Pro-Flex® CSST] can be
routed beneath, through and along side floor and ceiling joists. Consideration must be given to future
construction possibilities. Care should be taken when installing to maintain as much separation as reasonably
possible from other electrically conductive systems in the building.
• Pro-Flex® & Flak JacketTM can be routed inside hollow wall cavities. This is the preferred for vertical sections of
piping rather than horizontal sections. Avoiding horizontal runs through the walls will minimize the need for
protection. When constrained from moving by spray foam insulation, the tubing must be protected from
puncture by the specified protective devises.
• Pro-Flex® & Flak Jacket
TM
can be routed on top of ceiling joists. This is the preferred method of routing in areas
where slab-on-grade construction is prevalent and is considered to be supported by the joists.
• Pro-Flex® & Flak Jacket
TM
are listed to ANSI LC- 1 - CSA 6.26, which includes testing for suitability for exposure
of CSST piping systems to outdoor environments.
Note: Care should be taken when installing any type of fuel gas piping (Inc: CSST, Iron or Copper) to
maintain as much separation as reasonably possible from other electrically conductive systems in the
building.
Note: Manufactuer’s design and installation instructions, or instructions supplied with the part by the valve manufacturer,
shall include data on sizing and pressure drop across the device as a function of flow (up to the activation flow rate)
for each size valve.When an excess flow valve is supplied as part of the gas piping system, the CSST.
Note: Consult local building codes as to required separations for CSST from such conductive systems
including metallic chimney liners, metallic appliance vents, metallic ducting and piping and electrical cables.
Through Wall Penetrations and Plenums
FIRE STOPS:
• Pro-Flex® CSST with its polyethylene yellow jacket has been tested to the flame spread and smoke density
requirements of ASTME84 and meets limits imposed for this criteria. Pro-Flex® nonmetallic coating has an
ASTME-E84 flame spread of less than 25 and ASTM-E84 smoke density of less than 50. Other requirements
for the fire rated resistive constructions may be imposed by local codes. The qualified/trained installer must
meet local building codes with respects to flame and smoke density regulations for non-metallic materials
at all times.
• For Flak Jacket
with respect to flame spread and smoke density requirements for non-metallic materials, Pro-Flex, LLC
recommends either removing the black jacket or transitioning to rigid pipe when passing through such
areas.
TM
Arc-Resistant CSST with its black jacket, the installer shall address local building codes
20
Outdoor Installation Guidelines
a) OUTDOORS:
b) BURIED or EMBEDDED:
c) ALONG SIDE A STRUCTURE:
When Pro-Flex® or Flak Jacket
external jacket shall remain intact as much as possible for the given
installation. Any portions of the exposed stainless steel tubing shall be
wrapped with self bonding silicone tape [PFRT-50P] or sleeved to
prevent later threats by acids or chlorides such as cleaning solutions
for masonry.
Pro-Flex® & Flak JacketTM CSST SHALL NOT be buried directly in the
ground or directly embedded in concrete (patio slabs, foundations or
walkways) When necessary, to bury or embed CSST, the tubing shall be
routed inside a non-metallic, watertight conduit that has an inside
diameter at least 1/2 inch larger than the O.D. size of the CSST tubing.
The ends of the conduit installed outdoors, must be sealed at any
exposed end to prevent water from entering. NOTE: No mechanical
joint fittings are permitted in the conduit. (See page: 20)
When Pro-Flex®or Flak JacketTMCSST are installed along the
outside of a structure (between the ground and a height of 6 ft) in an
exposed condition, the CSST tubing shall be protected from
mechanical damage inside a conduit or chase. A conduit or chase is
not required if the tubing is installed in a location that will not subject
the CSST to mechanical damage.
TM
CSST are installed outdoors, the
Typical Installations of CSST With Non-Metallic Conduit
Embedded In Concrete Slab
Typical Installation of CSST With Non-Metallic Conduit
Buried Under Concrete Slab
21
Clearance Holes & Notching
a. Bored Holes - In locations where CSST is installed through bored holes in
joists, rafters, or wood members, holes shall be bored so that the edge
of the hole is not less than 2 in. (50.8 mm) from the nearest edge of the
wood member. Where this distance cannot be maintained at any point,
the CSST shall be protected by a listed striker plate of the appropriate
length and width installed in accordance with the manufacturers
installation instructions. The diameter of the bored holes shall be a
minimum of 1/2 in. (12.7 mm) larger than the outside diameter of the
tubing.
b. The size of the hole drilled through top plates, top frame members, and
sole plates, to allow the vertical passage of the tubing, shall not exceed
1/2 of the width of the member. The hole should be bored through the
center of the member. (See figure 4-1.)
c. Where soles or plates are cut for tubing, the width of the cut shall be
1/2 in. (12.7 mm) larger than the outside diameter of the tubing but not
greater than 2 in. (50.8 mm), and the tubing must be protected with a
listed striker plate of the appropriate length and width installed in
accordance with the manufacturers installation instructions. (See figure
4-1.)
d. Where a hole is to be bored in a joist, the hole should be located at the
centerline, otherwise no closer than 2 in. (50.8 mm) from the nearest
edge of the joist, and the hole diameter shall not exceed 1/3 the depth
of the joist.
(See figure 4-2.)
FIGURE 4-3
Holes in Non-Bearing Walls
No more than two successive
double board studs permitted
FIGURE 4-4
Holes in Bearing Walls
Holes and Cuts in Top and Sole Plates
FIGURE 4-1
FIGURE 4-2 - Holes in Wood Joists
e. Where holes are to be bored in non-bearing vertical members of the
wall framing, the size of such holes shall not be larger than 60 percent of
the width of the member. (See figure 4-3.)
f. Where holes are to be bored in bearing vertical members of the wall
framing, the size of such holes shall not be larger than 40 per-cent of the
width of the member. Holes up to 60 percent of the member’s width are
permitted if the members are doubled. No more than two successive
double bored members are permitted.(See figure 4-4.)
The size and depth of installation clearance holes or notches for
routing the tubing through wall studs and joists shall comply with
the requirements of the local building code.
CSST THROUGH METAL FRAMING
a. When CSST passes through metal framing members, it shall be installed
and protected in accordance as follows:
b. When using Pro-Flex® Flexible Gas Piping (CSST) through Metal framing
the CSST tubing must be protected by grommets, bushing or armor
(Floppy-Flex™), PVC tape, shrink sleeve material or a minimum of four (4)
wraps of #10 Mil Duct-Tape. This is to ensure that no physical contact
will be made between the metal and the CSST tubing that would cause
mechanical wear.
DRILLING:
Drilling holes should be made approx. 1/2” greater than the outside diameter of
the CSST Tubing.
g. Installing CSST in notches cut in either the top or bottom of joists are
prohibited.
22
CONCEALED FITTINGS LOCATION
Pro-Flex, LLC's Mechanical Fittings have been tested and listed per the requirements of ANSI LC-1 - CSA 6.26 for
concealed use. The fitting may be used for concealed attachment to appliance valves, branch runs using tee
fittings, and length splices.
These guidelines address some of the most common situations where concealing the fittings is the only practical
alternative. These guidelines cannot address all applications of concealed fittings, but instead, provide typical
instructions to demonstrate the principles that apply to fittings listed for installation in concealed locations.
(reference National Fuel Gas Code, NFPA 54, Section 3.4.2)
a) New Installations - When multiple gas outlets are supplied from a single run of CSST, each
downstream outlet branch can be connected to the main run using a tee-type fitting which
can be located in a concealed location.
b) Fireplace "key valves" - Flexible piping connections to fireplace key valves can be located in a
concealed location, when accessibility is not readily provided.
c) Exclusion - Manifold stations (2 PSI system), which include the multi-port manifold, shut-off
valve and pressure regulator, shall not be installed in concealed locations regardless of the
qualifications of the tubing.
Modifications to Existing Systems
a) New Ceilings in Unfinished Rooms/Basements - CSST fittings originally installed in accessible
ceiling locations can be concealed in the event a ceiling is installed at a later date.
b) Extensions to Existing Tubing Runs -
A concealed tubing can be modified
to permit an extension to another
appliance location provided there is
sufficient capacity to supply both
appliances at the same time. If an
accessible location for the modification
is not available, the existing tubing
run can be modified with a tee fitting
which will result in a concealed
fitting behind the wallboard.
c) Repairs to Existing Tubing Runs - Damaged tubing runs shall be repaired in accordance with the
instructions in this guide. The repair can result in a line splice that may ultimate-ly be located in
a concealed location.
d) Concealed tubing shall be protected from puncture threats, using the shielding devices
specified by the manufacturer, at all points of penetration through studs, joists, plates or similar
structures. The extent of protection shall be defined as follows:
1. At points of penetration less than 2 in (50.8 mm) from any edge of a stud, joist, plate, etc., a
listed striker plate is required to provide protection at the area of sup-port and within 5 in
(127 mm) of each side (if appropriate) of the support.
2. At points of penetration 2 to 3 in (50.8 mm to 76.2 mm) from any edge of a stud, joist,
plates, etc., a listed striker plate is required to provide protection throughout the area of
support.
3. At points of penetration greater than 3 in (76.2 mm) from any edge of a stud, joist, plate,
etc., no protection is required.
4. Tubing routed horizontally through studs shall be protected from puncture threats between
the studs using the shielding devices provided.
5. CSST greater than 1-in (25.4 mm) inside diameter installed within hollow cavity walls of 2” x
4” construction shall be protected along the entire concealed length in the manner and
using the shielding devices specified by the manufacturer.
6. The width of the installed striker plate, at the points of penetration through wall studs, floor
joists, plates, sills, etc., shall be out at least 1.5 times the outside diame-ter of the tubing.
23
4.4 Protection
PROTECTION IS REQUIRED WHEN CSST
TUBING IS CONCEALED, CONSTRAINED AND
WITHIN 3 INCHES OF A POTENTIAL THREAT.
Pro-Flex® & Flak JacketTMmust be protected where puncture or
other physical damage threats exist. Install protection devices,
i.e. striker plates as shown, to protect the installed tubing from
penetrations by drill bits, nails, screws and in those areas where
the tubing is concealed and will not be free to move to avoid
such puncture threats. [This includes areas where the tubing is
constrained by spray foam insulation.]
• Flexible gas tubing must be protected when it is
concealed, constrained, and within 3" [76.2mm) of
an interior surface.
• A 2 x 4 will always require protection because any
and all clearance holes for tubing will be less than
3" [76.2mm] away from the edge.
• Protection/Shielding is required 5" [127mm] [each
side where appropriate] beyond the support area
when points of penetration are less than 3" [76.2mm]
from any edge of structural members. Refer to figures
4-10, 4-11, 4-15, 4-16, and 4-18 for examples.
r examples.
FIGURE 4-12
Where Finished Exterior Wall Does Not Permit Installation
of Striker Plate, Protective Sleeve is Required.
Install Floppy-Flex strip wound steel conduit, which is another
protection device, which can and should be used at points of
support such as gas outlet terminations, short tubing runs and
where tubing is routed horizontally between studs. Strip wound
(Floppy-Flex) is required along the length within a wall partition
when tubing cannot be displaced a minimum of 3" (76.2mm) or if
distances between supports are less than 2 ft.
NOTE: The ID of the conduit [Floppy-Flex] must be at least 1/2"
larger than the OD of the CSST Tubing.
FIGURE 4-10
Long Unsupported Vertical Tubing Rugs (over 3 ft.) within a Hollow
Interior Wall Partition. Shielding Required at Support Area When Points
of penetration are Less than 2" From any Wall Surface.
When the exterior wall is finished before the installation of the
gas tubing and a striker plate cannot be installed, a protective
schedule 40 steel pipe sleeve shall be placed around the
tubing. The sleeve shall be secured to the sill or stud, be at
least 1/2in. (12.7mm) larger in its internal diame-ter than the
O.D. of the CSST, and extend no more than 4 in.(100 mm) above
the sill or beyond the stud. A striker plate shall also be placed
on the accessible side of the sill or stud as required.
Only Pro-Flex supplied, hardened striker plates,
listed for use with CSST systems may be used.
FIGURE 4-11
Figure 4-13
Figure 4-14
Long Unsupported Vertical Tubing Run (over 3 ft.) from a Termination Outlet Within a
Wall Partition. Shielding Required At Termination Outlet and Along Tubing Length
That Is Non-supported and Cannot Be Displaced a Minimum of 3 in. in the Direction
Away From Potential Penetration.
24
Floor
CSST
Tubing
Figure 4-15
Short Unsupported Tubing Run (under 3 ft.) from a Termination Outlet
within a Wall Partition. Shielding Required at Support Area (studs) when
Point of Penetration are Less than 2 in. from any Outside Surface.
Support
Floor Joists
3" or less
Striker Plates
Figure 4-18
CSST Tubing Going Through Joists Within 3" of Potential Nailing Surface.
Floor
CSST
Tubing
clearance 3"
or more
3" or greater
clearance
Floor Joists
Supports
Figure 4-16
Shielding Required at Support Area when Point of Penetration are between
1-1/2 to 2-1/2 in. from any Edge of a Stud, Joist, Plate, etc.
Figure 4-19
CSST Tubing Going Through Joists With More than 3" of Clearance from
Potential Nailing Surface do not require protection.
25
GUIDELINES FOR INSTALLATION OF PRO-FLEX® & FLAK JACKET
OUTDOOR APPLICATIONS [INCLUDING CORROSIVE ENVIRONMENTS]
TM
CSST FLEXIBLE GAS PIPING IN
Pro-Flex® & Flak Jacket
comply with the ANSI LC1 / CSA 6.26 standard. The following guidelines apply to both Pro-Flex® & Flak JacketTM
CSST when installed outdoors or in other corrosive environments [including but not limited to: crawlspaces, pool
mechanical rooms, and etc.]
• In outdoor applications, the external jacket should not be removed. All exposed tubing on the outside of a
structure or located between the ground and a 6 ft height must be protected in a sealed conduit or
weather-tight chase which is routed and secured to avoid mechanical damage.
• Any exposed stainless steel is to be wrapped with self bonding silicone tape [PFRT-50P].
• When buried underground or encased in cement (slabs, foundations, etc.) the tubing must be routed within
a non-metallic watertight conduit. This non-metallic conduit is to have an inside diameter 1/2 inch larger
than the CSST's outer diameter. Exposed conduit ends must be sealed to prevent entry of water and debris.
• Local code authority will always take precedence. Therefore make sure you check with your local building
authority or code authority having jurisdiction.
TM
tubing and fittings meet all performance requirements for outdoor applications and
4.5 Meter Hookups
Gas meters are generally supported by the building structure or by framework brackets independent of the
structure. Do not use Pro-Flex® or Flak JacketTM CSST as a direct connection to any meter which must be
supported by the piping. On structure supported meters, accepted practice is to connect the meter outlet to a
stub-out or termination plate mounted on the exterior wall or to penetrate the exterior wall with a steel pipe
and provide a rigid attachment for the meter and CSST tubing within the building.
26
On independently supported meters, CSST can, in some locations, be routed through the exterior wall and
connected directly to the meter. Direct connections must provide a loop or slack in the tubing to account for
building settling and meter movement. Wall penetration must be properly sealed following local code
guidelines. NOTE: Building codes vary from area to area. Check with your local utility and building codes to verify
that meter connections are acceptable Always remember, local jurisdiction will prevail.
Note: Prior to installing flexible gas piping by Pro-Flex® directly to a meter, ensure that the local utility allows this
practice as some utilities have regulations specifying meter attachments. Any exposed sections of stainless steel
piping must be wrapped with a silicone self-bonding tape. This is especially important with masonry and wood
frame construction.
27
4.6 Appliance Connections
Fixed Appliances:
Pro-Flex® & Flak Jacket
to fixed [non-movable] appliances such as water heaters,
furnaces, boilers, and island cook-tops without the
installation of a termination outlet or flexible appliance
connector, if local code allows. All local codes requiring
drig legs and shut-off valves must be observed.
TM
CSST may be connected directly
appliance
shut-off valve
When appliances such as water heaters, furnaces, etc.
have metallic vents which protrude through the roof
drip leg /
sediment trap if
required by code
physical contact between the CSST and the appliance
cabinet are prohibited.
union [if
required
by code]
Moveable Appliances: Termination Outlets:
APro-Flex® termination outlet eliminates the need for concealed fittings by allowing CSST to be routed to the exterior of a
wall or floor to provide a fixed connection point (stub-out). This fixed connection point allows for the attachment of flexible
appliance connectors to moveable appliances such as dryers and ranges.
PFST or PFVT Series Termination Outlet:
• Remove the fitting or valve body [leaving nut threaded to the
plate . There will be 3-4 male threads protruding through back of
plate.]
• Slide the tube through the back side of the nut/plate assembly.
• Place retainer ring in 4th valley; slide the slide ring to the retainer
ring; roll the O-ring on to meet the slide ring; ensure the high
temp gasket is in base of fitting/valve.
• Thread nut/plate onto fitting/valve until hand tight.
• Use a pair of wrenches to hold the nut and tighten fitting/valve
additional 1/4 to 1/2 turn.
• Mount the plate assembly to wall or floor[See wall mounting
options on next page].
28
PFTP Series Termination Outlet:
• Thread male fitting body completely into PFTP Series
Termination Plate. [this is easily accomplished by using
a vice to hold the termination plate.]
• Slide nut onto CSST tubing; place retainer ring in 4th
valley; slide the slide ring to the retainer ring; roll the
o-ring on to meet the slide ring; ensure high temp
gasket is in base of the fitting.
• Thread nut onto fitting/plate until hand tight.
• Use a pair of wrenches to hold the nut and tighten
fitting additional 1/4 to 1/2 turn.
• Mount the plate assembly to wall or floor[See wall
mounting options below].
Wall Termination Outlet Mounting Options
PFST, PFVT, & PFTP Series Termination
Outlets may also be mounted to the floor.
PFOX Series Series Wall Box
1. Fasten Ox Box supply box directly to stud and/or on support
bracket.
2. Disassemble Pro-Flex Fitting from nut.
3. Insert male threads on back of nut through hole in box and
hand tighten lock nut.
4. Apply pipe thread sealant to male threads on valve. Thread
into Pro-Flex Fitting and tighten.
5. Insert Pro-Flex Tubing through brass nut in bottom of box.
Assemble Pro-Flex Fitting per Section 4.2 of Pro-Flex
Installation / Training Guide.
6. When tightening the Pro-Flex nut to the fitting hold fitting
with wrench and turn nut (it may be necessary to loosen lock
nut) until hand tight then turn additional 1/4 to 1/2 turn
with an additional wrench.
7. Tighten lock nut.
8. Check all connections for leaks using leak detector.
9. Turn off gas supply and connect appliance according to
manufacturer's instructions using an approved appliance
connector.
The PFOX Series Wall Box also includes
an adapter for use with rigid pipe or
other CSST brands. See detailed
instructions included in packaging.
29
Gas Fireplace Installations
• Pro-Flex® & Flak JacketTM CSST SHALL NOT BE routed directly into a metallic fireplace enclosure that utilizes
a metallic vent that penetrates the structure's roof. The connection shall be made outside the firebox
utilizing rigid pipe, a stub-out, or a termination fitting.
• Where it is necessary to install Pro-Flex® or Flak JacketTM through masonry materials in fireplace
construction, the plastic jacket shall remain intact and the tubing should be routed through sleeving that is
appropriate for the application. Sleeving is not required through ceramic liners in decorative heat
generating fireplaces.
• Where it is allowed to install Pro-Flex® or Flak Jacket
non-vented or side wall vented gas fireplaces and vibration from fan motors could cause mechanical wear,
the jacket should remain intact and the tubing should be routed or supported to prevent direct contact
with the enclosure. If direct contact cannot be avoided, protections such as grommets, bushing or armor
(Floppy-Flex™), self bonding tape, shrink sleeve material or a minimum of four (4) wraps of #10 Mil DuctTape should be used. This is to ensure no physical contact will be made between the metal and the CSST
tubing that would cause mechanical wear. Note: Remove jacket only on the length of CSST that may be
exposed to the flame within the firebox.
For Log Lighter installations in all-fuel fireplaces, the CSST SHALL BE terminated at the keyed valve or
another point prior to entering the firebox.
TM
through sheet metal enclosures such as decorative
NOTE: In some configurations, the corrugated tubing (CSST) feeding gas logs or gas
fireplaces can cause a humming or whistle sound. This is due to the gas flow velocity
and can usually be prevented by choosing a larger piping size in accordance with
the chart below.
Suggested Maximum Capacity for Gas/Log Fireplace
TUBING SIZE
FLOW [1,000 BTU's] 22
3/8" (10 mm) 1/2" (15mm)
45
3/4" (20mm)
80
Outdoor Gas Appliance Installations
Deck Mounted Gas Appliances
BBQ Grills and Gas Lights [as well as other outdoor
appliances] that are permanently mounted to decks
shall be connected to the flexible gas piping system
[Pro-Flex® or Flak JacketTMCSST] as shown in Figure
4-32 and in conjunction with this guide. The outdoor
sections of the CSST shall be supported and
protected against any of the inside deck joists. Any
tubing that is not protected, must be protected in a
conduit or chase.
No Physical Contact
No physical contact Grommet
FIGURE 4-32
Elevated deck a fixed Pedestal mount grill or gas light
- direct connection
30
Moveable Outdoor Gas Appliances
BBQ Grills, Deck Heaters and other moveable
outdoor appliances shall be connected to an
approved outdoor appliance connector
transitioning to the CSST utilizing either a
termination outlet, or a quick disconnect outlet
such as Pro-Flex BBQ Kit [manufactured by MB
Sturgis] - the quick connect shall be installed in
accordance with the manufacturer's enclosed
instructions. [Figure 4-33]
�,
Striker
P
lates
Figure 4-33
Quick Disconnect
Post-Mounted Gas Appliances
Post-Mounted gas appliances such as gas lights or BBQ Grills may be connected to Pro-Flex's gas piping
systems as shown in Figure 4-34. All underground sections are to be protected with water-tight, non-
metallic conduit.
Figure 4-34
31
Pad Mounted Outdoor Gas Appliances
FIGURE 4-35
Pad mounted gas equipment such as Heat
Pumps, Pad Heaters and Natural or LP Gas
Generators, may be connected to a Pro-Flex
Flexible Gas Piping system [Pro-Flex® or Flak
TM
Jacket
CSST] by means of a termination
outlet that connects to an approved outdoor
appliance connector or a rigid pipe. Direct
connection is allowed when the CSST is
properly protected and mounted if local code
allows.
Roof Top Gas Appliances
Roof Mounted Equipment: FIGURE 4-36 - No special mechanical protection of the CSST is required for connections to
roof top equipment. Whenever possible, roof penetrations shall be located within 6 ft of the equipment to be
connected as shown in Figure (4-36). Long runs of tubing shall be supported with nonmetallic blocks every 4-ft. along its
outdoor length, and raised above the roof a distance determined by local
code/practice (4-37).
Lengths of CSST which run vertically up the side of the building shall be protected in accordance with the guidelines for
outdoor installations.
Figure 4-36 Short (2 to 6 ft.) outdoor connection
to roof mounted equipment
• Height of elevation based on local plumbing/building code requirements and/or winter ice buildup.
• When the equipment manufacturer requires the use of a flexible connector, the CSST shall be installed in a fashion similar to that shown in Figure
4-35
Figure 4-37 Long outdoor connection to roof
mounted equipment
Figure 4-38
Appliance termination/stub-out
32
4.7 Manifold Stations
Manifolds are installed where multiple runs are made from a common location in a parallel
arrangement. The manifold may be manufactured from a one piece, malleable iron or brass
casting; a welded fabrication of steel subcomponents; an assembly of approved, malleable
iron tees and short nipples. Depending on the location and available space, different mounting
arrangements are permitted. A manifold may be mounted on the surface of an interior wall,
between open floor joists, in attic spaces, crawlspaces, within a partition wall, or inside an
enclosure. The installation of manifold assemblies using a pounds-to-inches regulator must be
in accordance with all local codes, and the following guidelines:
1) Standard manifold - low to medium
pressure (14” w.c. or less)
(Drwg A)
2) Elevated pressure manifold - A manifold
assembly utilizing a pounds-to-inches
regulator shall be installed in an
accessible, ventilated location so that
the regulator can be inspected,
maintained and serviced if repair or
replacement is required. (Drwg B)
3) Behind access panel - For manifold systems
that use a pounds-to-inches regulator
installed behind an access panel, all tubing
penetrations in the cabinet must be sealed,
caulked or grommeted. The cabinet must be
ventilated through the panel/door and not
into a wall space.
(Drwg A)
4) Open face cabinets - Cabinets which
communicate with the normal room
environment, may be utilized without
the need for ventilation or penetration
sealing requirements.
(Drwg B)
33
4.8 Pressure Regulators
Description
a) A gas piping system utilizing gas pressures exceeding 1/2 psi (3.45kPa), but intended to serve
equipment rated for 1/2” psi (3.45 kPa) maximum, shall include a gas pressure regulator to limit the
downstream supply pressure to 1/2” psi (3.45 kPa), and the installation instructions for the piping
system shall specify that such a regulator shall be installed. For system pressures up to 5 psi (34.5 kPa),
the regulator shall incorporate construction which will “lock up” under no-flow conditions to prevent
excessive downstream pressure build-up. Pressure Drop from Bends and shall comply with the
applicable provisions of the Standard for Line Pressure Regulators, ANSI Z21.80 • CSA 6.22. For system
pressures above 5 psi (34.5 kPa), the regulator shall comply with a recognized national standard for
pressure regulators.
b) The Maxitrol 325-L Series regulators, supplied by Pro-Flex® are 2 psi line pressure regulators they are
used to drop the pressure from 2 psi to inches of water column. Contact Pro-Flex, LLC for additional
regulator options manufactured by Maxitrol. They can also be used as a line regulator on equipment
already fitted with an appliance regulator.
c) The materials of all component parts are carefully selected and corrosion resistant. The housings are
made of durable die cast aluminum, the diaphragm and self-aligning valve seat are made of nitrile
rubber which is selected to work at ambient temperatures of -40 to 205 degrees F (-40 to 96 degrees
C). All regulators are supplied with vent limiting devices that are made of brass and threaded with a
type “0” (NPT Thread).
Sizing Instructions
a) Line Pressure Regulator Selection
The Maxitrol 325-L Series Regulator is used in a 2 PSI gas piping installation to reduce supply pressure
to the appliance within required operating ranges (typically 4” - 7” WC. natural gas or 10” - 11” LP gas).
To select the correct regulator for pressure regulation, the following information must be established;
• Available inlet pressure range at the regulator inlet
• Desired outlet pressure
• Required maximum flow rate
• Refer to tables (below) to select the correct regulator to satisfy system
requirements.
34
Installation
a) The regulator shall be installed in an accessible location with an approved shut-off valve on the inlet side
and a union on the outlet side so that it may be inspected, maintained and serviced if repair or
replacement is required.
b) The regulator is suitable for multi-poise mounting. When using a vent-limiting device however, the
regulator must be mounted in a horizontal upright position. All regulators provided by Pro-Flex® include
a vent limiting device.
c) The vent limiter is a fail-safe device that
permits free air movement above the diaphragm
during normal operation. In the unlikely event
of a diaphragm rupture, the vent limiting device
will limit gas escapement to 1.0 CFH natural gas
at 2 PSI and 0.65 CFH LP at 2 PSI. Both values
are below the ANSI standard of 2.5 CFH.
Note: The vent-limiting device does not allow gas to escape to the
environment during normal mode operation.
d) Do not leak test the vent limiter with liquid leak test solution. This action will contaminate the internal
ball check mechanism or plug the breathing hole resulting in erratic regulator performance
e) Using a vent limiter, the maximum inlet pressure is 2 PSI.
f) When using a vent line, the line must be at least the same size as the regulator vent connection, and
cannot exceed a length of 30 ft. The vent shall be designed to prevent entry of water, insects or other
foreign materials that could cause blockage of the line.. Do not vent to appliance flue, pilot light or
building exhaust system.
FIGURE A
g) Maxitrol regulators have a lower temperature limit of -40 degrees F. The lower temperature limit and
rust proof construction design enables the regulator to be used for outdoor installations. To minimize
the potential for moisture condensation and freezing problems in or around the vent port, the vent
limiting device must be removed for outdoor installations and mounted upside down .
Outdoor Mounting Options:
The regulator may be mounted upside down with the open
vent port facing down. Consideration must be taken to ensure
there is adequate clearance for snow buildup.
FIGURE C
The regulator may be mounted horizontally, with a vent
tube installed in the venting port. The end of the tube
must be facing downward, and should be designed to
prevent water and foreign material from causing a
blockage.
FIGURE B
35
Line Regulator Capacity Tables
Natural Gas
Capacity @ Pressure Drop - 0.64 sp gr gas expressed in CFH (m3/h)
Model Number 7.0" W.C. (17 mbar) 1/2 psi (34 mbar) 3/4 psi (52 mbar) 1 psi (69 mbar)
325-3L 145 (4.0)
325-5-L
Capacity value for most typical 2 PSI parallel systems when trunk run is sized for 1 PSI pressure drop and a 3/4
PSI drop across regulator
338 (9.6) 476 (13.5) 583 (16.5) 673 (19.1)
Maxitrol Pressure Drop Table
204 (5.8) 250 (7.0) 289 (8.2)
Propane
Capacity @ Pressure Drop - 1.52 sp gr gas expressed in MBTUH LP
Model Number 7.0" W.C. (17 mbar) 1/2 psi (34 mbar) 3/4 psi (52 mbar) 1 psi (69 mbar)
325-3L
325-5L
Capacity value for most typical 2 PSI parallel systems when trunk run is sized for 1 PSI pressure drop and a 1/2
PSI drop across regulator
234 (6.4) 328 (9.3) 403 (11.3) 465 (13.2)
544 (15.5) 766 (21.7) 939 (26.6) 1084 (30.8)
Maxitrol Pressure Drop Table
Performance
a) A performance test should be conducted while operating all appliances at full load. This will test if
adequate pressure is reaching each appliance under full-load conditions. To accomplish this, measure
the line pressure at the appliance connection while operating the appliance.
b) The inlet pressure for a typical gas appliances under full load conditions should measure a minimum
of 4 inches of water column pressure for natural gas and a minimum 10 inches water column pressure
for propane. If these pressure ranges cannot be obtained, a slight adjustment to the service regulator
or the pounds-to-inches regulator may be necessary to increase line pressure.
Adjustment
a) Adjustment can be accomplished by first removing the regulator seal cap to expose the adjusting screw.
Turning the screw clockwise will increase outlet pressure, turning it counter-clockwise will decrease
pressure.
b) If spring adjustment will not produce the desired outlet pressure, check to make sure the main supply
pressure is adequate. If the main supply pressure is adequate, consult factory for other line-regulator
options. Do not continue to turn regulator adjusting screw clockwise if the outlet pressure readings do
not continue to increase. This may result in over-firing due to loss of pressure control, should
there be a subsequent increase in inlet pressure.
c) The 2 PSI system pounds-to-inches regulator can be adjusted with an outlet pressure ranging between 7
to 9 inches water column pressure for natural gas and 10 to 12 inches water column for propane. The
regulator must be adjusted according to the manufacturers recommended procedure. A pressure gauge
mounted just downstream of the regulator can monitor the set pressure under various loads.
d) The regulator outlet is pre-set and labeled at the factory for either 8” natural gas or 11” propane.
e) The average natural gas appliance is designed to operate at 3 to 4 inches water column pressure, and a
pressure difference of 1 to 2 inches of water column across the appliance regulator which will prevent
slow regulator response. Thus, the appliance regulator will operate best at 4 to 6 inches W.C. inlet
pressure. The pounds-to-inches system regulators for natural gas are set to deliver 8 inches of W.C.
outlet pressure under load to allow for 3 inches of W.C. pressure drop in the tubing.
f) The average propane gas appliance is designed to operate at 10 to 10-1/2 inches water column
pressure. Thus, the pounds-to-inches regulators for propane gas are set to deliver 11 inches water
column outlet pressure under load to allow for 0.5 inches water column pressure drop in the tubing.
g) Contact Pro-Flex, LLC for availability of additional regulator sizes and configurations [including 5 psi w/
OPD].
36
4.10 Electrical Bonding
• Per the 2009 or later versions of national model codes [NFPA-54 (National Fuel Gas
Code), the Uniform Plumbing Code (UPC), and the International Fuel Gas Code (IFGC)],
any gas piping system containing at least one segment of non-conductive (Yellow) coated
CSST must be bonded to the buildings electrical grounding electrode system.
• Pro-Flex® strongly recommends the equipotential bonding of all metallic mechanical
systems to the structure's grounding electrode. Bonding serves to protect people and
equipment in the event of an electrical event.
• All CSST manufactured by Pro-Flex, LLC shall be bonded in accordance with the national
model codes and these instructions. If there is an inconsistency between these
instructions and local codes, the local codes shall control
• There are no additional bonding requirements for Flak Jacket TM CSST set forth in the
manufacturer’s written instructions. Flak Jacket TM CSST is to be bonded in accordance
with the National Electric Code NFPA 70 section 250.104(B) in the same approach as the
minimum requirements for rigid metal piping. However, installers must follow any local
code requirements that are more stringent than the manufacturer’s written
instructions.
• Flak Jacket
• Neither Flak JacketTM nor Pro-Flex® CSST flexible gas piping are to be used as a
grounding conductor or electrode for an electrical system.
TM
CSST shall not be painted, otherwise coated or have labels applied.
When Direct Bonding is Required by Local Code or Manufacturer's Requirement:
a) Yellow jacketed Pro-Flex® CSST must be bonded in accordance with this section.
b) The bonding must be performed by a qualified person recognized by the local jurisdiction [AHJ]
as capable of performing such work.
c) A single bonding clamp that is listed to UL 467 is to be attached to EITHER a CSST Fitting OR a
rigid pipe or rigid component at any point in the gas piping system downstream of the gas meter
or second stage regulator in an accessible
location.
d) The bonding conductor [wire] is to be solid or stranded 6 AWG copper [minimum] or equivalent
an not to exceed 75 feet in length. The effectiveness of the bond will be improved utilizing the
shortest practical conductor [wire] length.
e) The bonding conductor [wire] is to be directly and permanently connected to the electrical
service grounding system. This can be achieved through a connection to the ground buss in the
electrical service enclosure, the grounding electrode conductor, or the grounding electrode
used. All grounding electrodes used shall be bonded to the electrical service grounding
electrode, or if available, the lightning protection grounding system.
f) The bonding shall be done in accordance with NFPA-70 [the National Electric Code] or CSA-
C22.1 [the Canadian Electric Code].
g) CSST shall not be directly supported on or by other electrically conductive systems including
metallic water pipe, electric power or communications cables, HVAC ducts or plenum, and
structural steel beams or framing.
h) A daisy chain configuration may be used to bond multiple gas services [meters] that are located
within a single structure.
37
BONDING CLAMP
CSST FITTING.
BONDING WIRE
Bonding Clamp Placement
on CSST Fitting
BONDING WIRE
Bonding Clamp Placement on
Rigid Pipe Component
BONDING CLAMP
BLACK PIPE COMPONENT OR CSST STUB-OUT
Depending upon conditions specific to the location of the structure in which the
flexible gas piping system is being installed, including but not limited to whether the
area is prone to lightning activity, the owner of the structure should consider whether
a lightning protection system is necessary or appropriate. Lightning protections are
beyond the scope of this guide, see NFPA 780, the Standard for the Installation of
Lightning Protection Systems, and other standards.
Failure to properly bond Pro-Flex® flexible gas piping systems in accordance with
NFPA 70 [NEC] may lead to damage to the CSST system in the event of a lightning
strike.
Proper bonding will help reduce the possibility and/or severity of arcing between
conductive systems when energized by a nearby lightning strike.
38
5.0 Inspection and Testing of Installed CSST
Pressure Testing and Inspection Procedure
a) The final installation must be inspected and tested for leaks in accordance with the local / state
codes. In the absence of local restrictions test in accordance with the procedures specified in Part 4 of
the National Fuel Gas Code, ANSI Z223.1 / NFPA 54, and/or the Natural Gas and Propane Installation
Code, CSA B149.1 & B149.2, or the International Fuel Gas Code, or in accordance with the requirements
of the applicable local codes. The installed gas piping system shall not exhibit any loss of pressure during
the field pressure test. When local codes are more stringent, local codes must be followed.
Note: Remove or isolate the pound-to-inches pressure regulator for system pressure test. Subjecting the regulator
to pressures greater than 10 PSI could damage the regulator and will not expose the downstream tubing to the
correct test pressure.
b) Pressure testing must be performed during rough construction of the facility (before interior walls are
finished). This will permit a more complete inspection of the piping system during the pres-sure testing.
c) Do not connect appliances or pressurize with fuel gas until after the pressure test has been performed.
d) All gas outlets for appliance connections should be capped during pressure testing.
e) A 2 PSI system usually requires a pressure test of 10 PSI or greater, depending on local code. In this case,
the regulator must be removed or isolated prior to pressure testing. The test may be performed as a onepart test replacing the regulator with suitable “jumper” pipe length for pressure testing the entire system.
Or a two-part test may be performed as shown in figure below.
• The first test is performed on the elevated pressure section, between the meter connection and the
pounds-to-inches house line regulator.
• The second test is performed on the low-pressure section, between the outlet of the pounds-to-inches
house line regulator and the gas appliance outlets.
• For a “two-part” test, it is important to remember to close both gas “shut-off” valves to avoid damage
to the regulator.
f) Electrical bonding must be in place as described on pages 37-38 “Electrical Bonding.”
39
g) Most jurisdictions also require an additional pressure or leakage test performed after the construction is
completed and finished interior walls are in place. The leakage test procedure is generally performed by
the gas utility at the time of setting their meter. This test is performed to assure no damage was done
to
the tubing during the closing-in construction process, and is typically required before gas service is
initiated.
Appliance Connection Leakage Check Procedure
After the final pressure test, inspection and final construction is complete (finished interior walls) connect the
appliances to the tubing system. This connection is made using approved stainless steel flexible connectors for
movable appliances such as a dryer or range, or with CSST tubing, or rigid black pipe for fixed appliances. Turn the
gas on at the meter and inspect for leakage before operating the appliances.
a) Connections made at the appliances should be leak checked with a chloride-free bubble solution.
b) Before placing the appliances in operation, the tubing system should be purged. This displaces the air
in the system with fuel gas. Be sure to vent into a well-ventilated area.
NOTE: Leak test solutions may cause corrosion to some types of material in the gas tubing system, be sure to water
rinse after the test and thor-oughly dry all contacted material. Also, the vent limiter should not be leak tested with a
liquid test solution. This will contaminate the internal ball check mechanism or plug the breathing hole, resulting in
erratic regulator operation.
40
5.1 Repair and Replacement of Damaged CSST
REPAIRING DAMAGED CSST TUBING & FITTINGS
Repair Classifications:
FITTINGS: Leaking fittings should be repaired in accordance with the manufacturers
installation instructions. In some cases, the entire fitting or parts of the fitting must
be replaced totally.
CSST TUBING: If the tubing is damaged, the severity of damage and if necessary, the
method of repair shall be determined as follows:
a. Tubing shall be repaired if damaged due to a puncture of any kind from nails, screws
or drill bits.
b. Tubing shall be repaired if significantly damaged due to impact or crushing as
indicated in Figure 4-44.
c. Tubing shall be repaired if bent beyond its minimum bend radius and there is a
crease or kink in the tubing.
(See Figure 4-45)
d. No repairs or replacements of tubing is necessary if the tubing is only slightly dented
due to minor impact or crushing. (See Figure 4-46)
41
METHODS OF REPAIR
There are different methods of repair which are discussed below depending on
the nature and severity of the damage.
The Installer must determine the most reliable and economical method of repair
using one of the following methods.
Replace the entire tubing run. When the tubing run is short and easily
accessible, it can be repaired faster and more economically by replacing
the whole run versus repairing only the damaged section. Replacement in
this instance is the preferred method because extra fittings are not
required.
Repairing damaged section. Damaged tubing shall be repaired by
methods listed below.
a. Remove the section of tubing which is damaged and connect the
new ends with a union fitting as shown in Figure 4-47 Use this repair
method if the damage section is small and there is enough slack tubing
in the run to makeup the damaged length.
Typical Tubing Splice with Union Fitting
FIGURE 4-47
Repair of Damaged Jacket - Flak Jacket
TM
A repair is required if the Flak JacketTM jacket material has been torn,
cut, ripped, or exposed to an electrical arc. The jacket shall be wrapped
around its circumference using self-bonding silicone tape [such as ProFlex part PFRT-50P], covering the entire damaged area. No exposed
stainless steel is permitted [this includes at the junctions of fittings and
tubing].
42
6.0 Sizing Tables
*Table includes losses for four 90 degree bends and two (2) end fittings. Tubing runs with larger numbers of bends and/or fitting shall be increased by an equivalent length of
tubing according to the following formula:
L = 1.3 (n) L = is the additional length (ft.) of tubing to be added to actual run. n = is the number of additional fittings and/or bends.
1
1
/4” 37 1346 950 775 671 600 547 474 423 386 357 334 315 299 244 211 188 172
1” 31 925 626 498 424 373 337 287 253 228 209 194 181 171 136 116 102 92
3/4” 25 400 283 231 200 179 163 141 126 115 107 100 94 89 73 63 56 51
1/2” 18 132 95 78 68 61 56 49 44 40 37 35 33 32 26 23 20 19
3/8” 15 90 64 52 45 41 37 32 29 26 24 23 21 20 16 14 13 12
Tube Size (EHD) 5 10 15 20 25 30 40 50 60 70 80 90 100 150 200 250 300
CAPACITY TABLES OF CSST – TABLE 2
Maximum Capacity of Pro-Flex
*Table includes losses for four 90 degree bends and two (2) end fittings. Tubing runs with larger numbers of bends and/or fitting shall be increased by an equivalent length of
tubing according to the following formula:
L = 1.3 (n) L = is the additional length (ft.) of tubing to be added to actual run. n = is the number of additional fittings and/or bends.
1
1
/4” 37 950 671 547 474 423 386 334 299 273 252 236 222 211 172 149 133 121
1” 31 626 424 337 287 253 228 194 171 154 141 131 123 116 92 78 69 62
3/4” 25 283 200 163 141 126 115 100 89 81 75 70 66 63 51 44 40 36
1/2” 18 95 68 56 49 44 40 35 32 29 27 25 24 23 19 16 14 13
Tube Size (EHD) 5 10 15 20 25 30 40 50 60 70 80 90 100 150 200 250 300
3/8” 15 64 45 37 32 29 26 23 20 18 17 16 15 14 12 10 9 8
CAPACITY TABLES OF CSST – TABLE 1
Maximum Capacity of Pro-Flex
Tubing Length (feet)
®
CSST in Cubic Feet per Hour of Gas Gas Pressure: 6 – 7 inches WC (1/4 psig) Pressure Drop: 1.0 inch WC (Based on a 0.6 Specific Gravity Gas)
Tubing Length (feet)
®
CSST in Cubic Feet per Hour of Gas Gas Pressure: 6 – 7 inches WC (1/4 psig) Pressure Drop: 0.5 inch WC (Based on a 0.6 Specific Gravity Gas)
NATURAL GAS LOW PRESSURE
Locate proper sizing table based on total pressure drop allowed in piping system by local utility for each installation.
43
*Table includes losses for four 90 degree bends and two (2) end fittings. Tubing runs with larger numbers of bends and/or fitting shall be increased by an equivalent length of
*Table includes losses for four 90 degree bends and two (2) end fittings. Tubing runs with larger numbers of bends and/or fitting shall be increased by an equivalent length of
tubing according to the following formula:
L = 1.3 (n) L = is the additional length (ft.) of tubing to be added to actual run. n = is the number of additional fittings and/or bends.
1
1
/4” 37 3310 2337 1906 1650 1475 1346 1165 1041 950 880 822 775 735 600 519 464 423
1” 31 2536 1717 1366 1162 1025 925 787 694 628 574 532 498 469 373 318 280 253
3/4” 25 979 692 565 490 438 400 346 310 283 262 245 231 219 179 155 138 126
1/2” 18 308 222 183 160 144 132 115 103 95 88 83 78 74 61 53 48 44
3/8” 15 220 156 127 110 99 90 78 70 64 59 55 52 50 41 35 31 29
TubeSize(EHD)5 1015202530405060708090100150200250300
CAPACITY TABLES OF CSST – TABLE 4
Maximum Capacity of Pro-Flex
tubing according to the following formula:
L = 1.3 (n) L = is the additional length (ft.) of tubing to be added to actual run. n = is the number of additional fittings and/or bends.
1
1
/4” 37 2337 1650 1346 1165 1041 950 822 735 671 621 581 547 519 423 366 327 299
1” 31 1717 1162 925 787 694 626 532 469 424 388 360 337 318 253 215 189 171
3/4” 25 692 490 400 346 310 283 245 219 200 185 173 163 155 126 109 98 89
1/2” 18 222 160 132 115 103 95 83 74 68 63 59 56 53 44 38 34 32
3/8” 15 156 110 90 78 70 64 55 50 45 42 39 37 35 29 25 22 20
Tube Size (EHD) 5 10 15 20 25 30 40 50 60 70 80 90 100 150 200 250 300
CAPACITY TABLES OF CSST – TABLE 3
Maximum Capacity of Pro-Flex
NATURAL GAS
Locate proper sizing table based on total pressure drop allowed in piping system by local utility for each installation.
Tubing Length (feet)
®
CSST in Cubic Feet per Hour of Gas Gas Pressure: 11 – 13 inches WC Pressure Drop: 6 inch WC (Based on a 0.6 Specific Gravity Gas)
Tubing Length (feet)
®
CSST in Cubic Feet per Hour of Gas Gas Pressure: 8 – 10 inches WC Pressure Drop: 3 inch WC (Based on a 0.6 Specific Gravity Gas)
44
Caution: Capacities show in Table 6 may exceed maximum capacity of the regulator. With a 1 psig regulator inlet pressure and a 20 inch WC drop across the regulator (8”
WC regulator outlet setting), the maximum flow capacity of a single 325-3 is 252 CFH, while the 325-5A is 587. The use of multiple parallel regulators may be required if per-
mitted by local code.
*Table includes losses for four 90 degree bends and two (2) end fittings. Tubing runs with larger numbers of bends and/or fitting shall be increased by an equivalent length of
tubing according to the following formula:
L = 1.3 (n) L = is the additional length (ft.) of tubing to be added to actual run. n = is the number of additional fittings and/or bends.
1
1
/4” 37 5040 3181 2903 2513 2246 1833 1774 1586 1294 1120 1001 913 791 707
1” 31 4065 2427 2190 1862 1642 1307 1261 1112 885 752 664 599 509 449
3/4” 25 1488 941 859 744 666 544 526 471 384 333 298 272 235 210
1/2” 18 458 297 272 238 214 176 171 154 127 111 100 91 80 72
3/8” 15 332 211 193 167 150 123 119 106 87 75 67 62 53 48
Tube Size (EHD) 10 25 30 40 50 75 80 100 150 200 250 300 400 500
CAPACITY TABLES OF CSST – TABLE 6
Maximum Capacity of Pro-Flex
*Table includes losses for four 90 degree bends and two (2) end fittings. Tubing runs with larger numbers of bends and/or fitting shall be increased by an equivalent length of
tubing according to the following formula:
L = 1.3 (n) L = is the additional length (ft.) of tubing to be added to actual run. n = is the number of additional fittings and/or bends.
1
1
/4” 37 3310 2337 1906 1650 1475 1346 1165 1041 950 880 822 775 735 600 519 464 423
1” 31 2536 1717 1366 1162 1025 925 787 694 626 574 532 498 469 373 318 280 253
3/4” 25 979 692 565 490 438 400 346 310 283 262 245 231 219 179 155 138 126
1/2” 18 308 222 183 160 144 132 115 103 95 88 83 78 74 61 53 48 44
3/8” 15 220 156 127 110 99 90 78 70 64 59 55 52 50 41 35 31 29
Tube Size (EHD) 5 10 15 20 25 30 40 50 60 70 80 90 100 150 200 250 300
CAPACITY TABLES OF CSST – TABLE 5
Maximum Capacity of Pro-Flex
NATURAL GAS
Locate proper sizing table based on total pressure drop allowed in piping system by local utility for each installation.
Tubing Length (feet)
®
CSST in Cubic Feet per Hour of Gas Gas Pressure: 2 psig Pressure Drop: 1 psig (Based on a 0.6 Specific Gravity Gas)
Tubing Length (feet)
®
CSST in Cubic Feet per Hour of Gas Gas Pressure: 13 – 14 inches WC Pressure Drop: 6 inch WC (Based on a 0.6 Specific Gravity Gas)
45
tor, the maximum flow capacity of a single 325-3 is 298 CFH while the 325-5A is 695 CFH. The use of multiple parallel regulators may be required if permitted by local code.
THIS TABLE. Consult with Pro-Flex, LLC for guidance.
Caution: Capacities shown in Table 7 may exceed maximum capacity of the regulator. With a 1.5 psig regulator inlet pressure and a 1 psig pressure drop across the regula-
Note: Table 7 does include the effects of pressure drop across the line regulator. If regulator pressure drop exceeds 1 psig across 325-3 or 325-5A regulators, DO NOT USE
*Table includes losses for four 90 degree bends and two (2) end fittings. Tubing runs with larger numbers of bends and/or fitting shall be increased by an equivalent length of
tubing according to the following formula:
L = 1.3 (n) L = is the additional length (ft.) of tubing to be added to actual run. n = is the number of additional fittings and/or bends.
1
1
/4” 37 9452 5967 5445 4713 4213 3437 3328 2975 2427 2101 1878 1714 1483 1326
1” 31 8228 4912 4433 3770 3325 2647 2552 2251 1791 1524 1344 1213 1031 909
3/4” 25 2783 1761 1608 1393 1245 1017 985 881 719 623 557 508 440 394
1/2” 18 828 537 493 430 387 319 310 279 230 201 180 166 144 130
3/8” 15 617 392 359 311 279 228 221 198 162 140 126 115 99 89
Tube Size (EHD) 10 25 30 40 50 75 80 100 150 200 250 300 400 500
Maximum Capacity of Pro-Flex
®
CSST in Cubic Feet per Hour of Gas Gas Pressure: 5 psig Pressure Drop: 3.5 psig (Based on a 0.6 Specific Gravity Gas)
CAPACITY TABLES OF CSST – TABLE 7
NATURAL GAS
Locate proper sizing table based on total pressure drop allowed in piping system by local utility for each installation.
Tubing Length (feet)
46
Propane
*Table includes losses for four 90 degree bends and two (2) end fittings. Tubing runs with larger numbers of bends and/or fitting shall be increased by an equivalent length of
*Table includes losses for four 90 degree bends and two (2) end fittings. Tubing runs with larger numbers of bends and/or fitting shall be increased by an equivalent length of
tubing according to the following formula:
L = 1.3 (n) L = is the additional length (ft.) of tubing to be added to actual run. n = is the number of additional fittings and/or bends.
1
1
/4” 37 3368 2378 1940 1679 1501 1370 1186 1060 967 895 837 789 748 610 528 472 431
1” 31 2449 1658 1320 1122 990 893 760 670 604 554 514 481 453 361 307 270 244
3/4” 25 1000 707 577 500 447 408 353 316 288 267 250 235 223 182 158 141 129
1/2” 18 322 232 191 167 150 138 120 108 99 92 86 82 78 64 56 50 46
3/8” 15 225 160 131 113 101 93 80 72 66 61 57 54 51 42 36 32 29
TubeSize(EHD)5 1015202530405060708090100150200250300
Gas Pressure: 13 – 14 inches WC (1/2 psig) Pressure Drop: 2.5 WC (Based on a 1.52 Specific Gravity Gas)
CAPACITY TABLES OF CSST – TABLE 9
tubing according to the following formula:
L = 1.3 (n) L = is the additional length (ft.) of tubing to be added to actual run. n = is the number of additional fittings and/or bends.
1
1
/4” 37 1501 1060 865 748 669 610 528 472 431 399 373 351 333 272 235 210 192
1” 31 990 670 533 453 400 381 307 270 244 224 207 194 183 145 124 109 98
3/4” 25 447 316 258 223 200 182 158 141 129 119 111 105 100 81 70 63 57
1/2” 18 150 108 89 78 70 64 56 50 46 43 40 38 36 30 26 23 21
3/8” 15 101 72 59 51 46 42 36 32 29 27 25 24 23 19 16 14 13
TubeSize(EHD)5 1015202530405060708090100150200250300
Gas Pressure: 11 inch WC Pressure Drop: 0.5 inch WC (Based on a 1.52 Specific Gravity Gas)
CAPACITY TABLES OF CSST – TABLE 8
PROPANE LOW PRESSURE GAS
Locate proper sizing table based on total pressure drop allowed in piping system by local utility for each installation.
Tubing Length (feet)
Maximum Capacity of Pro-Flex
®
CSST in Thousands of BTU per Hour of Undiluted Liquified Petroleum Gas
Tubing Length (feet)
Maximum Capacity of Pro-Flex
®
CSST in Thousands of BTU per Hour of Undiluted Liquified Petroleum Gas
47
permitted by local code.
Note: Table 11 does not include the effects of pressure drop across the line regulator. If regulator pressure drop exceeds 1 psig across 325-3 or 325-5A regulators, DO NOT USE THIS TABLE.
Consult with Pro-Flex, LLC for guidance.
Caution: Capacities show in Table 11 may exceed maximum capacity of the regulator. With a 1.5 psig regulator inlet pressure and a 1 psig pressure drop across the regulator (14 inch WC
regula-tor outlet setting), the maximum flow capacity of a single 325-3 is 467,000 BTU/hr., while the 325-5A is 1,088,000 BTU/hr. The use of multiple parallel regulators may be required if
*Table includes losses for four 90 degree bends and two (2) end fittings. Tubing runs with larger numbers of bends and/or fitting shall be increased by an equivalent length of tubing according to the
following formula:
L = 1.3 (n) L = is the additional length (ft.) of tubing to be added to actual run. n = is the number of additional fittings and/or bends.
1
1
/4” 37 14928 9424 8600 7443 6654 5429 5256 4479 3833 3318 2966 2707 2343 2094
1” 31 13007 7766 7008 5960 5257 4184 4035 3372 2832 2409 2124 1917 1630 1438
3/4” 25 4400 2784 2541 2201 1969 1608 1557 1328 1137 985 881 804 695 623
1/2” 18 1310 849 779 680 612 505 490 421 364 317 286 262 229 206
3/8” 15 976 621 567 492 441 361 349 298 256 222 199 182 157 141
Tube Size (EHD) 10 25 30 40 50 75 80 100 150 200 250 300 400 500
Gas Pressure: 5 psig Pressure Drop: 3.5 psig (Based on a 1.52 Specific Gravity Gas)
CAPACITY TABLES OF CSST – TABLE 11
DO NOT USE THIS TABLE. Consult with Pro-Flex, LLC. for guidance.
Caution: Capacities show in Table 10 may exceed maximum capacity of the regulator. With a 1 psig regulator inlet pressure and a 15 inch WC drop across the regulator (13 inch WC regulator out-
let setting), the maximum flow capacity of a single 325-3 is 342,000 BTU/hr., while the 325 5A is 796,000 BTU/hr. The use of multiple parallel regulators may be required if permitted by local code.
Note: Table 10 does not include the effects of pressure drop across the line regulator. If regulator pressure drop exceeds 17 inch WC across 325-3 or 325-5A regulators,
following formula:
L = 1.3 (n) L = is the additional length (ft.) of tubing to be added to actual run. n = is the number of additional fittings and/or bends.
*Table includes losses for four 90 degree bends and two (2) end fittings.Tubing runs with larger numbers of bends and/or fitting shall be increased by an equivalent length of tubing according to the
1
1
/4” 37 7959 5025 4585 3968 3548 2894 2802 2388 2044 1769 1581 1443 1249 1116
1” 31 6426 3836 3462 2944 2597 2067 1993 1666 1399 1190 1049 947 805 710
3/4” 25 2353 1488 1359 1177 1053 860 832 710 608 526 471 430 372 333
1/2” 18 724 469 431 376 338 279 271 233 201 175 158 145 126 113
3/8” 15 525 334 305 265 237 194 188 161 138 119 107 98 85 76
Tube Size (EHD) 10 25 30 40 50 75 80 100 150 200 250 300 400 500
Gas Pressure: 2 psig Pressure Drop: 1 psig (Based on a 1.52 Specific Gravity Gas)
CAPACITY TABLES OF CSST – TABLE 10
PROPANE LOW PRESSURE GAS
Locate proper sizing table based on total pressure drop allowed in piping system by local utility for each installation.
Tubing Length (feet)
Maximum Capacity of Pro-Flex
®
CSST in Thousands of BTU per Hour of Undiluted Liquified Petroleum Gas
Tubing Length (feet)
Maximum Capacity of Pro-Flex
®
CSST in Thousands of BTU per Hour of Undiluted Liquified Petroleum Gas
48
*Table reproduced from National Fuel Gas Code NFPA-54
4” 4.026 23000 15800 12800 10900 9790 8800 8100 7500 7200 6700 6000 5500 5000 4600
3” 3.068 11000 7700 6250 5300 4750 4300 3900 3700 3450 3250 2950 2650 2450 2280
2
1
/2” 2.469 6300 4350 3520 3000 2650 2400 2250 2050 1950 1850 1650 1500 1370 1280
2” 2.067 3950 2750 2200 1900 1680 1520 1400 1300 1220 1150 1020 950 850 800
1
1
/2” 1.610 2100 1460 1180 990 900 810 750 690 650 620 550 500 460 430
1
1
/4” 1.380 1400 950 770 660 580 530 490 460 430 400 360 325 300 280
1” 1.049 680 465 375 320 285 260 240 220 205 195 175 160 145 135
3/4” 0.824 360 250 200 170 151 138 125 118 110 103 93 84 77 72
1/2” 0.622 175 120 97 82 73 66 61 57 53 50 44 40 37 35
3/8” 0.493 95 65 52 45 40 36 33 31 29 27 24 22 20 19
Pipe Size (in.) Diameter (in.) 10 20 30 40 50 60 70 80 90 100 125 150 175 200
Nominal Iron Internal
IRON PIPE CAPACITYTABLES
SIZING TABLES AND PRESSURE DROP CHARTS
1/4” 0.364 43 29 24 20 18 16 15 14 13 12 11 10 9 8
Tubing Length ( feet)
Gas Pressure of 0.5 psi or less and a Pressure Drop of 0.5 in. WC
(based on a 0.60 Specific Gravity Gas)
Maximum Capacity of Steel IPS Pipe in Cubic Feet Per Hour with a
49
Reference Data
1/4 psi =
1/2 psi =
1 psi =
2 psi =
5 psi =
SPECIFIC GRAVITY FACTOR FOR
Pressure Conversion Factors Fuel Gas Information
6.921 in. w.c. =
13.842 in. w.c. =
27.684 in w.c. =
55.368 in. w.c. =
138.42 in. w.c. =
(approx. 7” w.c.)
(approx. 14” w.c.)
(approx. 28” w.c.)
(approx. 56” w.c.)
(approx. 140”w.c.)
Specific Gravity =
Note: to determine the CFH for Natural Gas, divide the BTU load by 1000.
To determine the CFH for Propane, divide the BTY by 2516.
NATURAL GAS
Natural Gas Propane
1000 2516BTU per Cubin Foot =
0.60 1.52
Gas piping systems that are to be supplied with a gas of a specific gravity other than 0.60 for
natural gas or 1.52 for propane shall apply a specific gravity factor. This conversion is
accomplished by multiplying the flow capacities given in Tables 1 through 15 and on the
pressure drop graph by the appropriate multiplier shown in the tables shown below. If the exact
specified gravity is not shown in the table, use the next higher specified gravity shown.
Specific Gravity Multiplier Specific Gravity Multiplier
0.35 1.31 1.00 0.78
0.40 1.23 1.10 0.74
0.45 1.16 1.20 0.71
0.50 1.10 1.30 0.68
0.55 1.04 1.40 0.66
0.60 1.00 1.50 0.63
0.65 0.96 1.60 0.61
0.70 0.93 1.70 0.59
0.75 0.90 1.80 0.58
0.80 0.87 1.90 0.56
0.85 0.84 2.00 0.55
0.90 0.82 2.10 0.54
50
7.0 Technical Data Sheet
Pro-Flex® & Flak Jacket
All system components are CSA approved
TUBING
TM
C.S.S.T. SPEC / DATA SHEET
Tubing:
Jacket Material:
Pro-Flex® Fittings
Male Fittings:
Female Fittings:
Union Fittings:
Termination Plates:
Retainer Rings:
Slide Rings:
Silicone O-Rings:
Hi-Temp Gaskets:
ASTM A240/A240M-95A Type 304 Stainless Steel
Pro-Flex® CSST - Yellow insulative polyethylene jacket
Flak JacketTM - Black Arc Resistant polyethyene jacket
C360 Brass
C360 Brass
C360 Brass
1018 Low Carbon Steel
ASTM A240/A240M-95A 304 Stainless Steel
ASTM A240/A240M-95A 304 Stainless Steel
Silicone Rubber, proprietary material
The gasket is made from a non-asbestos, proprietary
material. The gasket is compressed during the assembly
processes and should be inspected and replaced, if
necessary, when reusing the fitting.
Pro-Flex® Accsesories
Striker Plates:
Manifolds:
Valves:
Regulator:
Metal Conduit:
Manufactured of 16 ga hardened steel
Epoxy coated Standard 150 lb. Malleable Iron
manufactured orThreaded Fittings Single tee and
multiple tee manifold assemblies.
Ball valves which meet the ANS/ASM B 16.33 or CGA
9.1-M88 as approved shutoff valves for use with CSST
tubing.
Maxitrol 325-3L Series or equivalent.
Gal
vanized steel strip-wound
device.
51
metal conduit used as a protection
8.0 CSST Installation Checklist
Description
Corrugated Stainless Steel Tubing (CSST) has been design certified by CSA (formerly know as AGA, The American Gas
Association Laboratory since 1990) for use as a fuel gas piping system. CSST has been tested per ANSI LC1 - CSA 6.26 as
required for approval and is listed as an approved gas piping material in the National Fuel Gas Code [NFPA 54], the
International Code Series [ICC], and is a listed product with IAPMO and pursuant to section 302.1 Alternate Materials and
Methods of the Uniform Plumbing Code.
Approval: Conditions and Requirements
A flexible gas piping system using CSST must be installed in accordance with all local building codes and the manufacturer’s
instructions. The following check list is designed to assist the local administrative authority to perform an inspection of a
fuel piping system using corrugated stainless steel tubing.
1. Flexible Gas Piping may only be installed by a Qualified Installer who has successfully completed the
manufacturers Training Program. A manufacturer’s qualification/training card is required to
purchase and install Flexible Gas Piping.
2. Only the components provided or specified by the manufacturer (including strike protection) as part
of the piping system are to be used in the installation.
3. CSST routed in a location which is concealed, constrained and within 3 inches of a potential threat
will be protected against damage by protection devices listed in the manufacturers Installation/
Training Guide.
4. Sizing of the Flexible Gas Piping System must be performed using capacity tables found in the
manufacturer’s Installation/Training Guide or other code approved CSST capacity tables.
5. CSST shall not be connected to moveable appliances. Connection to moveable appliances such as
ranges and clothes dryers shall be accomplished with an approved flexible appliance connector.
6. The Flexible Gas Piping System must be pressure tested for leaks during rough construction in
accordance with all local codes. In the absence of local requirements, test in accordance with NFPA
54, National Fuel Gas Code which is 1 1/2 times the maximum working pressure but not less than 3
PSI. To subject the entire CSST system to pressure test, the pressure regulators should be isolated
or removed.
7. Regulators are suitable for multi-poise mounting. When using a vent limiting device however, the
regulator must be mounted in a horizontal upright position.
8. A manifold assembly utilizing a pounds-to-inches regulator shall include a ball-valve ahead of the
regulator and installed in an accessible location so that the regulator can be inspected, maintained
and serviced if repair or replacement is required.
9. When installed outdoors, the external jacket shall remain intact as much as possible. Exposed
portions of the stainless steel tubing shall be wrapped with self bonding silicone tape to provide
protection from corrosive threats.
10. For installation buried underground, concrete/asphalt or embedded in concrete, CSST must be routed
in a nonmetallic water-tight conduit which has an inside diameter at least 112 in. larger than the
outside diameter of the tubing. For under concrete/asphalt slab, sleeved CSST must be buried in
accordance with all local codes. No mechanical joints are permitted within the conduit.
11. Electrical Bonding must be in place as described on page XX under “Electrical Bonding/Grounding.”
WARNI NG: Impr oper ins tallation or oper ation of the sys tem may r esult in fire, e xplosion , or asph yxiation . Only
compo nents pr ovided o r specifi ed by Pr o-Flex, LLC, for use with Pro-Fle x® & Fla k JacketTM CSST as part of the fuel gas
syste m are to be used in the i nstallat ion. Us e of com ponents from othe r flexib le gas p iping sy stems oth er than those
speci fied as part of the Pro-F lex® sys tem is p rohibite d and may result in poor system p erformanc e and se rious bo dily
injur y or pro perty d amage.
While every e ffort has been ma de to pr epare th is docume nt in ac cordance with al l region al model codes in effect at its
print ing, Pro -Flex, L LC cannot guarant ee that the loca l admini strative authorit y will a ccept th e most re cent ver sion of
these codes. It is th e ultimat e respon sibility of the qualifie d install er to de termine suitabil ity and acceptanc e of any
build ing comp onent in cluding gas pipin g. Pro- Flex, LL C, manuf acturers of Pro-F lex® & F lak Jack etTM CSST assumes no
respo nsibilit y for lab or or ma terial f or instal lations made wit hout prio r determ ination of local code acc eptance.
52
9.0 Terminology
CONVERSION FACTORS
1
INCHES OF WATER COLUMN (in.-w.c.) - Method by which
pressure is measured inches by a manometer or pressure gauge. Used in the gas industry
when the pressure is less than 1 psi.
PRESSURE CONVERSION CHART
1/4 psi = 6.921 in. w.c. = (approx. 7 w.c.)
1/2 psi = 13.842 in. w.c. = (approx. 14 w.c.)
1 psi = 27.684 in. w.c. = (approx. 28 w.c.)
2 psi = 55.368 in. w.c. = (approx. 56 w.c.)
5 psi = 138.42 in. w.c. = (approx. 140 w.c.)
TERMINOLOGY
2
AGA - American Gas Association
ANSI - American National Standards Institute
ANSI Z223.1 - 1992 edition of the National Fuel Gas Code published by American National
Standards Institute. Also known as NFPA 54 (National Fire Protection Association pamphlet 54)
ASTM - American Society for Testing and Materials
APPLIANCE (Equipment) - Any device which utilizes gas as a fuel or raw material to produce
light, heat, power, refrigeration, or air conditioning.
APPROVED - Acceptable to the authority having jurisdiction.
ASME - American Society of Mechanical Engineers
AUTHORITY HAVING JURISDICTION -The organization, office or individual responsible
for “approving” equipment, an installation or procedure.
BTU - Abbreviation for British Thermal Unit, which is
raise the temperature of one pound of water one degree Fahrenheit.
CFH - Gas
1,000 BTU’s and LPG contains 2,500 BTU’s. Consult your local gas utility for actual BTU
content in your area.
CAN-CGA-B149-1 - Natural gas installation code book used in Canada. Most current
edition.
CAN-CGA-B149.2 - Propane gas installation code book used in Canada. Most current
edition.
CSST - Corrugated stainless steel tubing
CONCEALED GAS PIPING - Gas piping, which, when in place in a finished building,
would require removal of permanent construction to gain access to the piping.
CONNECTOR, GAS APPLIANCE - A factory-fabricated assembly of gas conduit and
related fittings designed to convey gaseous fuel, and used for making connections
between a gas supply piping outlet and the gas to an appliance. It is equipped at each
end for attachment to standard taper pipe threads.
DELIVERY PRESSURE - Gas pressure available after the gas meter.
DESIGN PRESSURE - The maximum permitted operating pressure.
DRIP LEG - The container (dirt trap pocket) placed at the lowest point in a system of
piping to collect foreign materials and condensate. The container must be accessible for
cleanout.
EHD (EQUIVALENT HYDRAULIC DIAMETER) - A measurement of the relative
hydraulic efficiency between different tube sizes. The larger the value of EHD, the
greater the flow capacity.
ELEVATED PRESSURE SYSTEM - Terms for any pressure above 1/2 PSIG, but less
than 5 PSIG.
EXPOSED GAS PIPING - Gas piping which will be in view in the finished structure.
FUEL GAS - A commonly distributed gas used for fuel such as natural gas, manufac-
tured gas, undiluted liquefied petroleum gas (vapor phase only), liquefied petroleum
gas-air mixtures of these gases (included propane and butane).
GAS UTILIZATION EQUIPMENT - Any device which utilizes gas as a fuel or raw material or both.
JOINT - A connection between two lengths of tubing or a length of tubing and fitting.
LISTED - Equipment or materials including a list published by an organization accept-
able to the authority having jurisdiction and concerned with product evaluation that
maintains periodic inspection of production of listed equipment or materials and whose
listing states either that the equipment or material meets appropriate standards or has
been tested and found suitable for use in a specified manner.
flow
rate
in cubic feet per hour. A CFH of natural gas usually contains
stated
the quantity of heat required to
LOCKUP PRESSURE, REGULATOR - The system pressure, immediately downstream
of the regulator, at which the regulator valve will completely close (leak tight) under noflow conditions to prevent the downstream pressure from exceeding a predetermined
level.
LOAD - The amount of gas required by an appliance, or group of appliances per their
manufacturers rating (see CFH definition).
MANIFOLD - A fitting to which a number of branch lines are connected.
MAXIMUM ACTUAL OPERATING PRESSURE - The maximum pressure existing in a
piping system during a normal annual operating cycle.
METER - An instrument installed to measure the volume of gas delivered through a piping system.
NFPA - National Fire Protection Agency
PIPING SYSTEM - As used in this manual, an assembly of corrugated stainless steel
tubing and tubing connection fitting, intended for field assembly and installed in residential or commercial building to distribute fuel gas to gas utilization equipment within the
building. The piping system may also include a gas pressure regulator(s), shutoff valves,
tube shielding devices, distribution manifold(s) and other approved devices or components.
PRESSURE - Unless stated otherwise, is expressed in pounds per square inch above
atmospheric pressure, i.e. gauge pressure (PSIG).
PRESSURE DROP - The loss of static pressure of flowing fuel gas due to friction or
other flow resistance in tubing, fittings, valves, regulators or other devices in the piping
system.
PRESSURE REGULATOR - A valve which reduces and maintains pressure. It automatically opens and closes in response to changing pressure conditions in the downstream
piping.
PSIG - Pounds per square inch, gauge. The pressure as read from a measurement
gauge or device. Gauge pressure is pressure above atmospheric pressure and is sometimes referred to as PSI.
PURGE - To completely displace an existing gas with a new gas.
QUALIFIED INSTALLER - Any individual, firm, corporation or company which either in
person or through a representative is engaged in and is responsible for the installation
or replacement of building gas piping systems, who is experienced in such work, familiar
with all precautions required, and has compiled with all the requirements of the authority
having jurisdiction.
QUICK-DISCONNECT DEVICE - A hand-operated device which provides a means for
connecting and disconnecting an appliance or an appliance connector to a gas supply,
and which is equipped with an automatic means to shut off the gas supply when the
device is disconnected.
REGULATOR, GAS APPLIANCE PRESSURE - A device placed in a gas line for controlling and maintaining a uniform pressure to the manifold or gas burning equipment
REGULATOR, PRESSURE - A device installed/placed in a gas line for reducing, controlling and maintaining the pressure in that portion of the piping system downstream of
the device. This device is used in elevated pressure systems and is referred as a pressure regulator in this manual.
REGULATOR, SERVICE PRESSURE - A device installed by the servicing gas supplier
to reduce and limit the service line gas pressure to delivery pressure.
REGULAT OR VENT - The opening in the atmospheric side of the regulator housing permitting the in and out movement of air to compensate for the movement of the regulator
diaphragm.
SHIELDING DEVICES - A component of the piping system (Floppy-Flex(tm)) used to
protect the installed corrugated tubing form accidental puncture by nails, screws or similar hardware at concealed tubing support points.
SPECIFIED GRAVITY - As applied to gas, is the ratio of the weight of a given volume to
that of the same volume of air, both measured under the same conditions.
STRIKER PLATES - A special type of shielding device used when concealed tubing is
run through wall studs, floor and ceiling joists or other structural members where tubing
movement is restricted.
TUBING - ASTM A240 Type 304 Annular Corrugated Stainless Steel Tubing which is
bendable and comes in 75 foot coils.
VALVE, SHUTOFF - A device used in piping to control the gas supply to any section of
the piping system or to an appliance.
VENT LIMITING DEVICE - A valve that limits the discharge of gas from a regulator in
the event of a diaphragm rupture. Gas discharge is limited to an ANSI approved level.
See manufacturer’s specifications.
WATER COLUMN, INCHES - method of stating pressure measured in inches of water
column by a manometer or pressure gauge. Refer to “CONVERSION FACTORS” listed
at the beginning of this text.
53
9.2 Limited Warranty
PRO-FLEX® INTERIOR GAS PIPING SYSTEM
Subject to the terms and conditions contained in this Limited Warranty, Tru-Flex Metal Hose Corp. “TRU-FLEX™" warrants to the original purchaser of the
Subject to the terms and conditions contained in this Limited Warranty, Pro-Flex, LLC, “Pro-Flex®” warrants to the original purchaser of the PRO-FLEX®
PRO-FLEX
Interior Gas Piping System that such product will be free from any defect in material and workmanship for a period of one (1) year from the date of instal-
date of installation. Should any such defects be discovered within one (1) year from the date of installation by a qualified installer the questionable
lation. Should any such defects be discovered within one (1) year from the date of installation by a qualifi ed installer the questionable PRO-FLEX
PRO-FLEX
should be returned to Pro-Flex, LLC at 501 S. State Road 341, Hillsboro, IN 47949, (877) 798-6291. If, upon inspection Pro-Flex, LLC determines the par t
inspection TRU-FLEX™determines the part to be defective in material or workmanship, then TRU-FLEX™will furnish a replacement, or at its option, repair
to be defective in material or workmanship, then Pro-Flex, LLC will furnish a replacement, or at its option, repair the defective part. This warranty does not
the defective part. This warranty does not include the cost of labor for removing and replacing or repairing the defective part nor does it cover the cost of
include the cost of labor for removing and replacing or repairing the defective part nor does it cover the cost of transporting the materials.
transporting the materials.
This warranty shall not apply to any component part of the Interior Gas Piping system product if it has been installed, altered, modifi ed, repaired or
This warranty shall not apply to any component part of the Interior Gas Piping system product if it has been installed, altered,
misused, through negligence or otherwise, in a way that in the opinion of Pro-Flex, LLC affects the reliability of, or detracts from the performance of the
modified, repaired or misused, through negligence or otherwise, in a way that in the opinion of TRU-FLEX™affects the reliability of, or detracts from, the
product. This limited warranty does not cover defects or damage resulting from abuse, neglect, lack of reasonable care, modifi cation or attachment of
performance of the product. This limited warranty does not cover defects or damage resulting from abuse, neglect, lack of reasonable care, modification or
improper components or devices to this product. Nor does this limited warranty cover replacements to repairs necessitated by loss or damage resulting
attachment of improper components or devices to this product. Nor does this limited warranty cover replacements to repairs necessitated by loss or
from any cause beyond the control of Pro-Flex, LLC including, but not limited to, acts of God, acts of government, fl oods and fi res.
damage resulting from any cause beyond the control of TRU-FLEX™including, but not
limited to, acts of God, acts of government, floods and fires.
INSTALLATION REQUIREMENTS
This limited warranty coverage is subject to and expressly contingent upon the following conditions and limitations; each of the following is a condition
This limited warranty coverage is subject to and expressly contingent upon the following conditions and limitations; each of the
precedent to Pro-Flex® obligations hereunder.
following is a condition precedent to TRU-FLEX’S™obligations hereunder:
A. Installation must be performed strictly in accordance with local plumbing and/or building codes, ordinances and regulations and all other applicable
B. Installation must be performed by a qualified installer who is recognized as being qualified to install gas piping by local, state, federal or other
C. Pressure testing must be performed during rough construction with piping system exposed, all done in accordance with good and safe business prac-
D. TRU-FLEX
D. Pro-Flex® assumes no responsibility for any system which has been improperly installed.
E. The purchaser shall be responsible for giving timely written notice of a warranty failure and promptly making TRU-FLEX
®
Interior Gas Piping System that such product will be free from any defect in material and workmanship for a period of one (1) year from the
®
part should be returned to TRU-FLEX™at P.O. Box 247, 2391 So. State Road #263, West Lebanon, IN 47991, (765) 893-4403. If, upon
taws, and in accordance with the PRO-FLEX
®
Installation/Training Guide and good industry practices. Any deviation from recommended installation or
®
part
use instructions will nullify this limited warranty.
governmental agencies.
tices.
™
assumes no responsibility for any system which has been improperly installed.
™
aware of any alleged system
deficiencies which purchaser desires to be remedied, all of which shall be done within seven (7) days of discovery of the alleged system deficiency.
GENERAL CONDITIONS AND LIMITATIONS
The obligation of Pro-Flex® pursuant to the warranty is limited, at Pro-Flex’s discretion, to: (a) making a replacement component part available, (b) the
The obligation of Pro-Flex® pursuant to the warranty is limited, at Pro-Flex’s discretion, to: (a) making a replacement component part available, (b) the
The obligation of TRU-FLEX™pursuant to this warranty is limited, at TRU-FLEX’S™discretion, to: (a) making a replacement component part available, (b)
repair of the defective component part, or (c) the refund of the purchase price. Pro-Flex® shall have no obligation for the furnishing of any labor involved
repair of the defective component part, or (c) the refund of the purchase price. Pro-Flex® shall have no obligation for the furnishing of any labor involved
the repair of the defective component part, or (c) the refund of the purchase price. TRU-FLEX
or connected therewith such as the labor required to diagnose trouble or to remove or install any such product, nor does it include responsibility for any
or connected therewith such as the labor required to diagnose trouble or to remove or install any such product, nor does it include responsibility for any
involved or connected therewith such as the labor required to diagnose trouble or to remove or install any such product, nor does it include responsibility
transportation expenses or any damages or losses incurred in the transportation in connection therewith.
transportation expenses or any damages or losses incurred in the transportation in connection therewith.
for any transportation expenses or any damages or losses incurred in the transportation in connection therewith.
Pro-Flex® shall in no event be liable for other losses, damages, costs or expenses claimed by anyone, whether direct or indirect, and whether arising in
Pro-Flex® shall in no event be liable for other losses, damages, costs or expenses claimed by anyone, whether direct or indirect, and whether arising in
TRU-FLEX
contract or tort, including loss from failure of the product to operator for any period of time, and all other direct, indirect, special, incidental or consequen-
contract or tort, including loss from failure of the product to operator for any period of time, and all other direct, indirect, special, incidental or consequen-
contract or tort, including loss from failure of the product to operator for any period of time, and all other direct, indirect, special, incidental or consequen-
tial damages, including all personal injury and property damage.
tial damages, including all personal injury and property damage.
tial damages, including all personal injury and property damage.
The foregoing limited warranty is in lieu of all other warranties by Pro-Flex, LLC, express, statutory or implied by law. Without limiting the generality of the
The foregoing limited warranty is in lieu of all other warranties by Pro-Flex, LLC, express, statutory or implied by law. Without limiting the generality of the
The foregoing limited warranty is in lieu of all other warranties by TRU-FLEX
foregoing, Pro-Flex® makes no warranty of merchantability or fi tness of the product for any particular purpose. Pro-Flex® neither assumes nor authorizes
foregoing, Pro-Flex® makes no warranty of merchantability or fi tness of the product for any particular purpose. Pro-Flex® neither assumes nor authorizes
foregoing, TRU-FLEX™makes no warranty of merchantability or fitness of the product for any particular purpose. TRU-FLEX™neither assumes nor
any person to assume Pro-Flex® any other obligation or liability in connection with the sale of the hereinabove referenced product.
any person to assume Pro-Flex® any other obligation or liability in connection with the sale of the hereinabove referenced product.
authorizes any person to assume TRU-FLEX
™
shall in no event be liable for other losses, damages, costs or expenses claimed by anyone, whether direct or indirect, and whether arising in
™
, express, statutory or implied by law. Without limiting the generality of the
™
any other obligation or liability in connection with the sale of the hereinabove referenced product.
™
shall have no obligation for the furnishing of any labor
54
Notes
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Notes
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56
Please visit our website: www.ProFlexCSST.com or to register to become a qualifi ed installer or fi ll
out and mail the card below.
Please fill in all blanks to verify you have read and understand all aspects of the installation/training guide and for warranty activation.
Pro-Flex® & Flak Jacket
have read the installation/training guide and understand the PRO-FLEX
Flexible Gas Piping Systems. I am a qualified installer per my local
authority. This qualification expires 2 years after date signed.
To be shown to the wholesaler when making purchases
of PRO-FLEX
I, _____________________________________________________
date: __________________________________________________
QUALIFIED INSTALLER CARD
PF# AR-_________
®
CSST Tubing and Fittings.
I, ____________________, Qualified Installer, have read the Pro-Flex
please PRINT your name above
®,
LLC
InstallationTraining Guide and understand all aspects of installation for Pro-
Flex® & Flak JacketTM CSST, local plumbing and/or building codes in
accordance set forth.
TM
Signed this day ____________________________,
CSST
_________________________
PF# AR-__________
signature of Qualified Installer
Contractors Company Name:
Address:
Phone Number:
Email:
NOTE: Return above postcard to: TRU-FLEX METAL HOSE CORPORATION,
NOTE: Return above postcard to: PRO-FLEX, LLC,
®
[877] 798-6291 501 S. State Road 341 Hillsboro, IN 47949
please PRINT your name above
_____________________
_____________________
_____________________
( )_________________
_____________________
TO: TRU-FLEX METAL HOSE CORP.
TO: PRO-FLEX, LLC
PO BOX 247
501 S. STATE ROAD 341
WEST LEBANON, IN 47991
HILLSBORO, IN 47949
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