IPEX System 636 Installation Manual
Installation Methods for IPEX System 636
®
Type BH Class IIA (PVC) and Class IIB (CPVC)
Gas Venting Systems
A. Examine all components for possible shipping damage prior to installation.
B. Proper joint construction is essential for a safe installation. Follow these instructions exactly as written.
C. This venting system must be free to expand and contract. This venting system must be supported in
accordance with these instructions.
D. Check for proper joint construction when joining pipe to fittings.
E. Check for unrestricted vent movement through walls, ceilings, and roof penetrations.
F. Different manufacturers have different joint systems and adhesives. Do NOT mix pipe, fittings
or joining methods from different manufacturers.
System 636 Pipe, Fittings and Cements are certified as a system and must be installed as such.
Table of Contents
Product Application .........................................................1
Limits of Use and Application............................................1
Termination Requirements .................................................3
Support and Restraint Spacing ..........................................7
Expansion and Contraction...............................................8
Firestops .......................................................................11
Appliance Testing ..........................................................11
Vent Connection to the Appliance....................................11
Solvent Welding ............................................................11
Basic Principles ......................................................12
Priming .................................................................14
Set and Cure Times ................................................16
Required Quantities ................................................17
Safety Precautions ..................................................18
Handling and Storage....................................................19
Cement and Primer.................................................19
Pipe and Fittings ....................................................20
System 636 Statement of the Basis for Acceptance............22
Maintenance.................................................................23
Training........................................................................23
Accessory Installation Instructions ....................................24
Access Tee.............................................................24
Low Profile Side Wall Termination Kit........................25
Concentric Vent Termination Kit................................28
System 636 Installation Methods
i
Introduction
System 636®PVC and CPVC Type BH Gas Venting Systems are third party certified to ULC S636, latest edition.
The following installation methods have been prepared in conformity with the requirements of section 4 of ULC Standard S636.
1. Product Application
IPEX System 636 PVC and CPVC Gas Venting Systems are intended for positive and negative pressure venting of gas fired appliances
producing exhaust gases having temperatures limited to the range specified in 1(a) and 1(b).
(a) System 636 PVC venting systems are suitable for temperatures up to and including 65°C (149ºF); ULC S636 Class IIA.
(b) System 636 CPVC venting systems are suitable for temperatures up to and including 90°C (194ºF); ULC S636 Class IIB.
System 636 PVC and CPVC have a zero clearance to combustible construction.
2. Limits of Use and Application
(a) Improper installation of System 636 PVC or CPVC systems may result in personal injury or death. Only qualified personnel should
attempt the installation of gas burning equipment, following the gas appliance manufacturers directions.
(b) All System 636 gas venting pipe and fittings must be carefully inspected before use to ensure no damage has occurred during
transportation. Any damaged product must be replaced. No attempt at repairs are to be made at the job site.
(c) The common temperature changes in a gas venting application will cause the system to expand and contract accordingly, proper care
must be taken to allow for this movement through walls, ceilings, and roof penetrations. The venting system must be supported in
accordance with these instructions.
1
System 636 Installation Methods
(d) Only certified System 636 PVC or CPVC primer and cement shall be used to assemble System 636 PVC or CPVC venting systems.
* All IPEX System 636 cements contain special additives to aid in identification during warranty claims.
NOTE: Follow IPEX solvent welding procedures as shown in this manual, and check for proper joint construction when joining pipe
to fittings.
(e) Venting should be as direct as possible with a minimum number of fittings. The maximum vertical rise or horizontal run of vent pipe
plus the total number of fittings in a single vent installation shall not exceed the requirements outlined in the appliance manufacturer’s
installation instructions.
(f) All framing requirements for floor and ceiling penetrations shall be in accordance with the local building code and/or the local
regulatory authority.
(g) All penetrations of fire rated floors and walls shall be firestopped as described in Section 7 of this manual.
(h) Roof penetrations should be sealed with a plumbing roof boot or equivalent flashing as per the local building code, or as
permitted by the local regulatory authority.
(i) Chemical attack can cause product failure. Only use PVC/CPVC chemically compatible sealants, gaskets and adhesives.
(j) If spray foam insulation comes in contact with System 636, it is recommended that foam be applied in a maximum layer thickness
of 2 inches (50mm) until the required thickness of insulation is achieved.
(k) All horizontal sections of the venting system must be installed with a slope not less than 20mm/m (0.25 in./ft.) down towards the
appliance in order to collect condensate and remove condensate generated inside the line. The removal of condensate will help
reduce the possibility of ice buildup and blockage. Refer to the appliance manufacturers' installation instructions for further details
regarding the installation of necessary condensate drains.
System 636 Installation Methods
2
3. Termination Requirements (positive pressure venting)
yp
8" MIN.
Separation
Typical Roof Termination
3" MAX separation
Insulation in
unconditioned
space
Reducer Coupling
Approved Penetration
and Flashing as per
Building Code
Unconditioned
Attic Space
12" Above avg.
snow accumulation
Provide support for
intake and vent lines
Install condensate drain
as per appliance
manufacturer’s
recommendations
VentIntake
(a) Installation and location of terminations must be in accordance with the latest edition of
appliance manufacturer’s installation instructions, local building code requirements and
CSA B149.1 Natural Gas and Propane Installation Code.
Figure 1
Vent
Insulation in
unconditioned
space
12" MAXIMUM
Reducer coupling
3
System 636 Installation Methods
(b) Intake and vent pipes may be routed either horizontally through an outside wall
(see Figure 1) or vertically though the roof (see Figure 2).
(c) To avoid recirculation of exhaust gas on roof terminations, the end of the vent pipe must be
higher than the intake pipe. The minimum vertical separation between the end of the vent pipe
and the end of the intake pipe is 8 inches (see Figure 2).
(d) The runs of intake and vent pipes for terminations in general should be installed as close
together as possible. Specific spacing limits are 3" maximum separation for roof
Figure 2
penetrations and 6" maximum separation for wall penetrations (see Figures 1, 2 & 3).
(e) Terminate the vent piping straight up when through a chimney or fortified
penetrations (see Figure 2). For wall penetrations, the vent should be straight out or
elevated (see Figure 3).
(f) Intake piping terminating through the roof must terminate straight down through the
use of two 90° elbows (see Figure 2). On wall terminations intake piping should
point straight down through the use of one 90º elbow. (see Figure 1).
Insulation
Intake
Outside Wall
ical Wall Termination
T
Top View
6" MAX
separation
2" 90º Elbow
8" MINIMUM
(g) A reducer may be used on the vent termination to increase the velocities of the exiting
12" MAXIMUM
Side View
Typical Wall Termination Restricted Grade
Insulation in
unconditioned space
Reducer Coupling
Provide support for
intake and vent
lines every 5 feet
Unconditioned space
Outside wall
Insulation
8" MINIMUM
12" Above expected
snow accumulation
Vent
Intake
gases away from the intake (see Figures 1 & 3). Do not direct exhaust to window wells,
alcoves or stairwells.
(h) The exit points of gas venting pipe must not be less than 3 ft. from an opening into
another building.
Figure 3
(i) Domestic Type Clothes Dryers
A moisture-exhaust duct from a domestic type clothes dryer shall not terminate within 3 ft (1m) in
any direction of any System 636 pressure regulator vent termination or fresh air intake.
Commercial Type Clothes Dryers
A dryer shall be connected to a metal moisture-exhaust duct that terminates outdoors
and shall not be less than 3 ft (1m) from any System 636 pressure regulator vent
terminations and not less than 10 ft (3m) from a fresh-air intake.
(j) The termination of the fresh air intake through the wall should be such that the bottom of the 90º elbow must be at a level of at
least 12 inches above the expected height of snow accumulation (see Figure 3).
(k) Except for: 1) appliances certified to ANSI Z21.10.3 / CSA 4.3 (Gas-fired Water Heaters,
ratings above 75,000 Btu per hour, circulating and instantaneous)
pressure steam and hot water boilers) insulating in unconditioned space is required for all vent piping. Insulation should also be considered
for inlet piping near the outside wall to prevent pipe condensation (See Figure 1). Insulation must have an R value sufficient to prevent
freezing of condensate. Consult with the insulation manufacturer for compatibility of insulation with System 636 pipe and fittings.
(Type 1):
(Type 2):
Volume III, Storage water heaters with input
and 2) appliances certified to ANSI Z21.13 / CSA 4.9 (Gas-fired low
System 636 Installation Methods
4
(l) Follow appliance manufacturer's instructions regarding vent to appliance connections. Refer to ULC Standards Bulletin 2009-18.
(Interpretation: Clause 4.7 F, ULC - S636-08, Standard for Type BH Gas Venting Systems).
(m) For concentric vent installations see Concentric Vent Termination Kit section.
4. Chimney Installations
IPEX considers it acceptable to install System 636 piping through an existing unused
chimney space. It is suggested that installers adhere to the following guidelines when
doing such installations:
(a) Vent pipe sizing to be as per appliance manufacturers’ instructions or technical
manual.
Figure 4
To Te rmination
(b) Any existing non-certified vent piping cannot be re-used for venting and should be
(c) It is recommended that the chimney space be cleaned prior to installation to remove
(d) All recommended practices for solvent welding must be observed in the same
(e) Multiple vent pipes are permitted in one chimney space as limited by the interior available cross-sectional area. Zero clearance is
5
System 636 Installation Methods
replaced with System 636 Class IIA or IIB as required.
any debris, creosote, or other material.
manner as regular System 636 installations.
permitted between multiples runs of System 636 piping or other combustibles. (refer to Figure 4).
Coupling to sit on riser clamp to
support weight or section above
Clamp to be snugly fit but allowing
pipe travel due to expansion
From Appliance
Chimney Installations
(f) Fresh air intakes may also be installed within existing unused chimney spaces providing acceptable spacing and clearance is obtained
at the termination as per appliance manufacturer requirements.
(g) Vertical piping through the chimney space or any other vertical spaces exceeding 20 ft (6m) is to be structurally supported by use of a
pipe coupling installed immediately above and sitting upon a snugly fit pipe clamp. One of these pipe coupling and pipe clamp
combinations is to be installed at the entrance of the chimney space to support the pipe weight. The clamp at the entrance of the
chimney is to be rigidly fixed against the wall or floor (see Figure 4). Should the pipe run exceed 60 feet (18 meters) inside the
chimney space, please contact IPEX for further guidance.
(h) It is recommended that consideration be given to obtaining an air-tight or water-tight seal as required at the chimney exit to prevent
entry of water, snow, moisture or cold air.
(i) The use of System 636 Deep Socket Couplings is recommended when available for added joint strength for chimney installations.
System 636 Installation Methods
6
5. Support and Restraint Spacing
(a) System 636 PVC and CPVC systems must be supported horizontally at a maximum of every 5 ft (1.5 m).
(b) Supports to be used on System 636 pipe shall be suitable for use on plastic pipe and shall not be tightly clamped onto the pipe to
allow for possible expansion/contraction movement. Pipe clamps or hangers shall not have sharp edges or fulcrum points which might
damage the System 636 pipe over time.
(c) Changes in direction (e.g. 90° elbows) should be supported as close as practical to the fitting to avoid introducing excessive torsional
stresses into the system. This is especially important for vertical 90º bends. If support is being applied to the fitting, then the fitting must
be free to move during expansion and contraction of the venting system.
(d) System 636 horizontal venting shall be supported with steel strapping or equivalent. Strapping shall meet the following requirements.
• 1/2" strapping - 22 gauge steel • 3/4" strapping - 28 gauge steel
Strapping shall be fixed to supporting structure (e.g. floor joists or cross members) using typical framing nails or screws.
(e) In order to adequately support the weight of vertical vent pipe, a pipe anchor or support shall be installed at the first floor penetration
and every second floor thereafter with a System 636 coupling installed immediately above it. Securely fasten pipe anchors or supports
to the building structure. Pipe anchors or supports used for this purpose shall be suitable for use with plastic pipe. These anchors or
supports shall be snugly fastened to the vent in order to support the weight of the vent, but shall not be allowed to deform or damage
the vent. Anchors or supports supporting the weight of the vertical vent shall be in addition to the required pipe straps which are
intended only to maintain the position of the vertical vent while allowing for expansion and contraction. Make certain that allowance for
expansion and contraction is provided in all venting installations.
7
System 636 Installation Methods
6. Expansion and Contraction
To accommodate expansion/contraction movement and stresses that may occur, IPEX suggests the following guidelines during installation:
1. Leave adequate clearance between any System 636 elbows and walls or the underside of floor boards or joists.
2. Use loose fitting clamps and hangers to allow free pipe movement if required.
3. For critical areas such as near the appliance outlet, two 45º elbows is recommended for use in lieu of one 90º elbows for more
structural flexibility.
System 636 Installation Methods
8
Loading...