Charlotte Pipe and Foundry is a privately held company
committed to providing the highest quality products and
service to the plumbing industry. We offer a full line of pipe
and fittings in a wide range of materials. Our ChemDrain®
Chemical Waste Drain System uses CPVC pipe and fittings
specifically designed for management of chemical waste.
The ChemDrain® System is designed and manufactured to
provide easier installation, fewer callbacks and virtually
trouble-free service for as long as the system is in use.
Charlotte Pipe and Foundry’s investment in state-of-theart production equipment and outstanding customer service
have created an excellent source of supply for our customers.
We are constantly focusing on process improvement to find
better ways to further enhance customer service. We’ve
invested millions in increasing manufacturing efficiency,
productivity and capacity. Because we manufacture for
inventory, we are able to ship orders complete and in a
timely manner.
ChemDrain® Technical Manual
Cameron, Texas
Huntsville, AlabamaCedar City, Utah
Manufacturing Facilities
• Monroe, North Carolina • Wildwood, Florida
Wildwood, Florida
Charlotte Pipe, ChemDrain and “You can’t beat the system” are registered trademarks of Charlotte Pipe and Foundry Company.
2
• Muncy, Pennsylvania • Huntsville, Alabama
• Cameron, Texas • Cedar City, Utah
TABLE OF CONTENTS
GENERAL INFORMATION Page
Introduction to Charlotte Pipe and Foundry ..................................................................... 2
Charlotte, Charlotte Pipe, ChemDrain and “You can’t beat the system” are registered trademarks of Charlotte Pipe and Foundry Company.
3
GENERAL INFORMATION
ChemDrain® Technical Manual
Understanding safety alert Messages
It is important to read and understand this manual. It contains information to help protect your safety and prevent problems.
“WARNING” Indicates a hazardous situation which, if not
avoided, could result in severe injury or death.
“CAUTION” Indicates a hazardous situation which, if not
avoided, could result in minor or mo derate injur y.
“NOTICE” Indicates a hazardous situation which, if not
avoided, may result in system failure and property damage.
READ & SAVE THESE INSTRUCTIONS
4
GENERAL INFORMATION
Major advantagesof CPvC
Charlotte Pipe’s ChemDrain® CPVC chemical waste system,
manufactured with CPVC, provides a durable and economical
disposal solution for many chemical waste applications.
For more than 50 years, CPVC has been used in a variety
of chemical processing applications. Now, Charlotte Pipe
is offering ChemDrain CPVC pipe and fittings specifically
engineered for laboratory chemical waste disposal systems.
Commercial and academic laboratories generate liquid waste
that must be treated or neutralized before reaching the sewer
system. One of the major benefits of CPVC is its resistance to
a broad range of acids and corrosive chemicals. This range
makes it an ideal system for labs, which use an unusually wide
variety of chemicals. Additionally, a chemical waste drainage
system must be able to handle the routine disposal of both hot
and cold chemicals.
CPVC is an attractive alternative to glass, stainless steel, lined
steel, high silicon cast iron, PP (polypropylene) and PVDF
(polyvinylidene fluoride) for chemical waste and an excellent
choice for long-term value.
Chemical waste piping systems must be designed to convey
the mixtures of corrosive liquids generated by commercial
and institutional laboratories to a point where it is either
sufficiently diluted or neutralized before being discharged into
the sanitary sewer system. CPVC is particularly well-suited to
the task because it exhibits excellent chemical resistance to
a broad range of chemicals including strong and dilute acids,
bases, caustics, salts, aliphatic solutions and other common
reagents. In addition, ChemDrain CPVC can convey liquids in
gravity drainage applications at temperatures up to 220° F.
CPVC also overcomes many common problems that have
been inherent in chemical waste piping systems up until now.
Glass and high silicon iron systems are cumbersome, fragile,
and have a high initial cost. Polypropylene lacks the ability
to withstand the elevated temperatures that are common
in some systems and isn’t as good as CPVC in some highly
concentrated acids. PVDF is excellent in strong acids but
not recommended for many common alkaline solutions. And
both polypropylene and PVDF are usually installed using
time-consuming, complicated and at times unreliable fusion
joining methods. It’s easy to make consistent reliable joints
in the ChemDrain system using simple hand tools, a specially
formulated one-step solvent cement and easily trained labor.
Bottom line, the ChemDrain CPVC system is often the best
single choice for chemical waste drainage.
The ChemDrain CPVC pipe and fitting system is much easier to
join than the mechanical or heat fusion PP or PVDF systems.
CPVC pipe is lightweight, approximately one-sixth the weight
of iron and requires no special tools for cutting. Each piece
is manufactured by Charlotte Pipe to exacting standards to
avoid time-consuming trouble or delays during installation.
And there’s no expensive heat fusion equipment to buy or rent.
Failure to follow safety precautions may result in
misapplication or improper installation and testing which
can cause severe personal injury and / or property damage.
Primers and cements are extremely flammable and may
be explosive. Do not store or use near heat or open
flame, or death or serious injury may occur.
• Solvent fumes created during the joining process are
heavier than air and may be trapped in newly installed
piping systems.
• Ignition of the solvent vapors caused by spark or flame
may result in injury or death from explosion or fire.
• Read and obey all manufacturers' warnings and any
instructions pertaining to primers and cements.
• Provide adequate ventilation to reduce fire hazard and
to minimize inhalation of solvent vapors when working
with cements, primers and new piping systems.
CPVC is joined by solvent cement – the most commonly used
technique for thermoplastic pipe and fittings in the chemical
processing industry – which results in a permanent weld. Solvent
cementing has been employed for decades to join thermoplastic
pipe and fitting systems for a variety of applications including
corrosive fluids at elevated temperatures.
ChemDrain one-step solvent cement is designed to create a
intermolecular bond between pipe and fitting surfaces. Once
properly applied and cured, the joint is permanent. Melted
joints, corrosion of exposed internal heating wires and burnthrough, all problems in the joining systems of heat-fused
plastic products, are not possible with CPVC.
Our ChemDrain CPVC Solvent Cement has been specially
formulated for chemical resistance to caustics including
hypochlorites, mineral acids and other corrosive chemicals.
Charlotte Pipe manufactures both ChemDrain pipe and fittings
to our exacting tolerances, meaning everything is designed
to fit together properly. This is the exclusive Charlotte Pipe
TrueFit® System.
5
GENERAL INFORMATION
compressed air or gas in PVC / ABS / CPVC
Benefits of CPVC Include:
Cost Effective
• CPVC is easy to install, reliable and durable, lowering your
total costs of ownership over the life of the system. CPVC
piping is extremely lightweight, convenient to handle and
competitively priced against alternative materials. When
properly installed and used, its durability and resistance
to chemical corrosion make it a long-term, cost-effective
option.
Easy Installation
• CPVC pipe is lightweight, approximately one-half the
weight of aluminum and one-sixth the weight of steel,
and requires no special tools for cutting. Each piece is
manufactured by Charlotte Pipe to exacting standards
to avoid time-consuming trouble or delays during
installation. Also, CPVC has smooth, seamless walls and
can be installed with fast and reliable solvent welded
joints.
Failure to follow proper installation practices,
procedures, or techniques may result in personal injury,
system failure or property damage.
• Use a solvent cement / primer applicator that is 1/2 the
size of the pipe's diameter. Too large an applicator will
result in excess cement inside the fitting. Too small an
applicator will not apply sufficient cement.
• Cut pipe square.
• Do not use dull or broken cutting tool blades when
cutting pipe.
• Do not test until recommended cure times are met.
ChemDrain® Technical Manual
Testing with or use of compressed air or gas in PVC / ABS
/ CPVC pipe or fittings can result in explosive failures and
cause severe injury or death.
• NEVER test with or transport/store
pipe or fittings.
• NEVER test PVC / ABS / CPVC pipe or
fittings with compressed air or gas, or air
over water boosters.
• ONLY use PVC / ABS / CPVC pipe for water
or approved chemicals.
• Refer to warnings in PPFA User Bulletin
4-80 and ASTM D 1785.
Corrosion Resistance
• CPVC is inert to most acids, bases, salts and a variety
of organic media, within certain limits of concentration
and temperature. A chemical waste management system
of CPVC piping provides the chemical resistance for a
wide variety of dedicated and mixed chemical applications
when properly diluted by flushing with water. CPVC also
eliminates the disadvantages found in alternative piping
materials, such as borosilicate glass, high-silicon cast iron
or double-containment piping, which can be heavy, fragile
and expensive to purchase, install and maintain.
reCoMMended ProdUCt aPPliCation
A ChemDrain® CPVC chemical waste management system
offers a wide-ranging solution to the dilution and disposal needs
of institutional and academic laboratories. When properly
designed, installed and utilized, the system will deliver years
of reliable, problem-free service.
Best Uses of CPVC
One of the key advantages of a ChemDrain CPVC system is its
resistance to a broad range of acidic and caustic chemicals.
The inherent wide-ranging chemical resistance has led to the
Charlotte ChemDrain system being tested and certified for
chemical waste drainage by NSF International and bears the
mark NSF-cw.
CPVC compares favorably to other commonly used nonmetallic chemical wast e piping mate rials and has a
To the best of our knowledge the information contained in this publication is accurate. However, Charlotte Pipe and Foundry does not
assume any liability whatsoever for the accuracy or completeness of such information. Final determination of the suitability of any
information or product for the use to be contemplated is the sole responsibility of the user. The manner of use and whether there is any
infringement of patents is also the sole responsibility of the user.
6
GENERAL INFORMATION
“recommended” rating for widely-used concentrations of
many corrosive chemicals and common laboratory reagents.
Please refer to the comprehensive chemical resistance chart
on pages 17 through 23 for information on both CPVC as well
as the fluoroelastomer which is used in ChemDrain Transition
fittings as well as important notes concerning the use of CPVC
in chemical waste applications.
The Chemical Resistance data located in this manual is
for CPVC in a typical laboratory drainage environment.
To reduce the risk of system failure, always evaluate the
chemical resistance information and project specific
factors.
• Laboratory Drainage is defined as: The routine noncontinuous disposal of a wide variety of hot and cold
chemicals in relatively small quantities in a gravity
drainage system accompanied by water sufficient for the
purpose of dilution and flushing.
• Refer to the Plastics Technical and Installation Manual
available at www.charlottepipe.com for chemical
resistance information for industrial or continuous
chemical drainage applications.
• Chemical resistance of plastics is dependent on
concentration, possible interactions with other
chemicals, temperature, stress and other factors.
7
GENERAL INFORMATION
ChemDrain® Technical Manual
Product Certification
ChemDrain® CPVC chemical waste system is a complete system of pipe, fittings, solvent cement and accessories. Charlotte Pipe
and Foundry CPVC pipe and fittings are listed for chemical waste systems by NSF International and bear the mark NSF-cw.
For additional information log on to www.nsf.org.
Physical Properties of CPVC Material
PROPERTY CPVC 4120 UNITS STANDARD
Mechanical Properties
Specific Gravity 1.55 ASTM D 792
Tensile Strength (73°F) 7,000 psi ASTM D 638
Modulus of Elasticity in Tension (73°F) 360,000 psi ASTM D 638
Flexural Strength (73°F) 15,100 psi ASTM D 790
Izod Impact Cell Class 23447 (notched at 73°F) Min. 1.5 Fittings ft lb/ in. ASTM D 256
Hardness (Durometer D) – ASTM D 2240
Hardness (Rockwell R) 119 ASTM D 785
Compressive Strength (73°F) 10,100 psi ASTM D 695
Hydrostatic Design Stress 2,000 psi
Thermal Properties
Heat Distortion Temperature at 264 psi Minimum 212°F (Cell Class 23447) degrees F ASTM D 648
Coefficient of Thermal Conductivity .95 BTU/ hr/sq ft/ °F/ in. ASTM C 177
Coefficient of Linear Expansion 3.4 x 10-5 in./ in./ °F ASTM D 696
Specific Heat 0.34 BTU/lb°F ASTM D 2766
Water Absorption (24 hrs at 73°F) .03 % weight gain ASTM D 570
Cell Classification 23447-Pipe and Fittings ASTM D 1784
Flammability
Limiting Oxygen Index 60% ASTM D2883
Burning Rate Self Extinguishing ASTM D 635
Burning Class V-0 UL 94
Flame & Smoke Rating
Flame Spread 0 CAN/ULC S 102.2
Smoke Developed2 8-22
Solvent Cement Heavy Body, ASTM F 493
Mustard Yellow Color
1
Above data is based upon information provided by the raw material manufacturers. It should be used only as a recommendation and not as a guarantee of
performance.
1
Based on test of physical product, as opposed to test of material only. Test was conducted on 11⁄2” - 6” pipe.
2
Results vary based on pipe diameter.
8
GENERAL INFORMATION
reCoMMended sPeCifiCation
System: ChemDrain
Scope: This specification covers CPVC Schedule 40 pipe and fittings for chemical waste drain applications.
ChemDrain is intended for use in non-pressure drain applications where the temperature will not exceed
220° F.
Specification: Pipe and fittings shall be manufactured as a system, be the product of one manufacturer and be manufactured
in the United States. All pipe, fittings and solvent cement shall be supplied together as a system, as
Charlotte Pipe ChemDrain chemical waste system manufactured by Charlotte Pipe and Foundry. Pipe
and fittings shall conform to National Sanitation Foundation Standard (NSF) 14.
Special drainage systems for corrosive chemical or acid waste shall be manufactured from CPVC Type
IV, Grade I, ASTM Cell Class 23447. All system components shall be certified by NSF International for
use in chemical waste drain systems and bear the mark NSF-cw. All system piping shall be Schedule 40
CPVC produced to the dimensional requirements of ASTM F 2618 and the manufacturer’s specifications.
All pipe fittings shall be CPVC drainage patterns meeting the requirements of ASTM F 2618 and the
manufacturer’s specifications, as applicable.
Installation shall comply with the latest installation instructions published by Charlotte Pipe and Foundry
and shall conform to all applicable plumbing, fire and building code requirements. Buried pipe shall be
installed in accordance with ASTM D 2321 and ASTM F 1668. Solvent welded joints shall be made with
ChemDrain One-Step solvent cement conforming to ASTM F 493. The system shall be protected from items
that are not compatible with CPVC compounds; materials like thread sealants, plasticized vinyl products,
fire stopping devices or other aggressive chemical agents. Systems shall be hydrostatically tested after
installation. WARNING! Use of compressed air or gas in CPVC pipe or fittings can result in explosive
failures and cause severe injury or death.
®
CPVC-CW Schedule 40 Pipe and Fittings
Significance and Use:
The requirements of this specification are intended to provide pipe, fittings and drains suitable for use in
chemical waste disposal within the limitations described in this manual.
Reference Standards*: ASTM D 1784 Rigid CPVC Vinyl Compounds
ASTM D 2321 Underground Installation of Thermoplastic Pipe (non-pressure applications)
ASTM F 493 Solvent Cements for CPVC Pipe and Fitting
ASTM F 1668 Procedures for Buried Plastic Pipe
ASTM F 2618
NSF Standard 14 Plastic Piping Components and Related Materials
*Note: Latest revision of each standard applies.
Standard for Chlorinated Poly (Vinyl Chloride) Chemical Waste Drainage Systems
reCoMMended sPeCifiCation short forM
Special drainage systems for corrosive or acid waste shall be manufactured from CPVC Type IV, Grade I compounds with a
minimum cell classification of 23447. Pipe and Fittings shall conform to ASTM F 2618. Pipe shall be Schedule 40 dimensions.
One-Step Solvent Cement shall be specially formulated for chemical waste applications and conform to ASTM F 493. All pipe,
fittings and cement shall be supplied as a system by a single manufacturer and shall be certified by NSF International for use
in corrosive waste drain systems and shall bear the mark “NSF-cw”. Special Drain system is to be the ChemDrain® system
as manufactured by Charlotte Pipe and Foundry Co. Installation to be in accordance with manufacturer’s instructions and all
applicable code requirements. Buried pipe shall be installed in accordance with ASTM D 2321 and ASTM F 1668. The special
drainage system is intended for the listed chemicals for use in non-pressure chemical waste applications with a maximum
working temperature of 220° F.
9
GENERAL INFORMATION
ChemDrain® Technical Manual
handlingand storageof CPvC PiPe
Receiving Pipe
When receiving CPVC pipe, thoroughly inspect pipe before
unloading. For pipe transported on an open truck bed, examine
for shipping damage from over-tightened tie-down straps,
improper treatment or a shift in load. If pipe is delivered in a
closed trailer, the inspection should happen when the trailer is
first opened. Make sure the pipe has not been damaged by a
load shift, rough handling or having other materials stacked
on top of it.
To inspect CPVC pipe:
• Examine visually for cracks, splits, gouges or other forms
of damage.
• Check for severe deformation of pipe as this may cause
joining problems during assembly.
• Inspect interior for internal splits or cracks in all pipes
measuring 4 inches in diameter or more. A flashlight
may be necessary to perform this part of the inspection
satisfactorily.
If damage is found, all parties involved, including the driver,
must be made aware of the damage. Also note damage on the
bill of lading and/or delivery ticket. Notify Charlotte Pipe and
the carrier within 24 hours of any damage, as well as delivery
errors or shortages.
Handling Pipe
CPVC piping is incredibly sturdy. As a result, workers sometimes
have a tendency to treat it as if it is indestructible. However,
reasonable care should be used during handling to reduce the
risk of damaging the pipe. Refrain from unnecessary abuse when
unloading, storing and handling. Do not drop pipe from trucks,
drag pipe over the ground or step on pipes. When unloading,
do not drag or push pipe from truck bed. Remove and handle
pallets of pipe with a forklift.
NOTE: Avoid contact with sharp objects such as rocks, angle
irons or the forks of a forklift. Pipe should never be lifted or
moved by inserting forks of a forklift into the pipe ends.
NOTE: In addition to following these guidelines, extra care
should be used when handling CPVC pipes measuring 4 inches
in diameter or more. Because of the additional pipe weight, even
a minor impact can cause cracking. Plastic pipe also becomes
more brittle as the temperature decreases. Use extra precautions
when handling pipe at temperatures of 50°F and lower.
Storing Pipe
Store CPVC pipe in a heated, ventilated area, preferably
indoors. If CPVC pipe is stored outdoors for long periods, cover
it with a non-transparent material to avoid UV exposure. When
storing outside, place pipe on level ground that is dry and free
of sharp objects. CPVC pipe with the thickest walls should be
placed on the bottom of the pile if different schedules of pipes
are stacked together.
Pipe that is in pallets should be stacked with the pallet boards
touching. Pallet boards should not be placed directly on CPVC
pipe, as they can damage the pipe or cause it to bow. If pipe
is stored in racks, the pipe should be supported continuously
along its length. If this is impossible, supports should be no
more than 3 feet apart.
10
DESIGN AND
ENGINEERING DATA
Weathering
UV Exposure
Ultraviolet (UV) radiation from sunlight can cause surface
discoloration in CPVC pipe. The reaction occurs when energy
from the sun excites the molecular bonds in the plastic, but
affects only the exposed surface of the pipe to a shallow depth
of 0.001 to 0.003 inches. The reaction ends when exposure
to sunlight ends.
Placing an opaque shield between the sun and the pipe prevents
UV degradation. CPVC pipe should be covered with an opaque
material when stored outdoors for long periods of time.
Burying CPVC pipe provides protection against UV attack.
Painting pipe with latex (water-based) paint also will help
protect CPVC pipe installed above ground. However, proper
surface preparation is crucial for painted pipe. First, clean
the CPVC pipe to remove moisture, dirt and oil, and then wipe
dry with a clean cloth. NOTICE: Do not use petroleum-based
paints as the petroleum will prevent the paint from properly
bonding to the pipe.
Cold Weather Considerations
CPVC is a ductile material that expands and contracts more
than metallic plumbing pipe does. However, like all plumbing
materials, CPVC must be protected from freezing with proper
insulation in accordance with all plumbing codes.
Like other piping materials, CPVC may split when liquids
freeze in it, causing potential system failure and severe
personal injury.
If a CPVC line should freeze, it is crucial to thaw the line if
possible. If the frozen section of pipe is accessible, blow heated
air directly onto the pipe using a low wattage heater/blower.
When thawing a frozen CPVC line, the heat source should
not exceed 180°F. Electrical heat tapes also can be applied
to the area.
Also, eliminate the source of cold air that caused the pipe to
freeze. Until this can be done, drain the system if overnight
temperatures are likely to drop below 32°F.
11
DESIGN AND
ENGINEERING DATA
Charlotte Pipe’s ChemDrain® System offers a complete
solution for creating a state-of-the-art CPVC chemical waste
drain system that can deliver years of reliable, trouble-free
service. From proper installation techniques to chemical
resistance to fluid flow calculations, the pages that follow
lay out everything needed to design and install a ChemDrain
system for optimum performance.
Charlotte Pipe urges users to carefully study this information
and to follow it precisely. ChemDrain has been created as a
total system, and all warranties and guarantees depend on
designing and implementing the system as recommended.
flUid floW ProPerties
Gravity Flow
CPVC is an extremely smooth material. Its low surface friction
properties make CPVC as smooth as glass, but without its
disadvantages (weight, high breakability). To determine the
fluid velocity, pipe size and hydraulic slopes for a gravity
drain, it is best to use the Manning’s equation shown below.
In the equation:
V = Velocity of flow in feet/second
N = Manning’s value (see “Manning Roughness
Factor”, below)
R = The hydraulic radius, in feet. This is obtained by dividing
the cross-sectional area of flow by the wetted perimeter
of the pipe in contact with the flow. (R is a special case
for V with pipes that are either 1/2 full or full; in those
cases, R = inside diameter / 4, in feet)
S = Upstream elevation – Downstream elevation/(ft./ft.)
pipe length
V = 1.486 R
N
2/3 S1/2
ChemDrain® Technical Manual
Example 2:
Calculate the gravity flow for a 4”-diameter Schedule 40
CPVC pipe, flowing half full over a 10-foot pipe run with a
1.5-inch drop.
S = 20”-18.5” / 12” = 0.0125 ft./ft.
10 ft.
R = 4.026” / 12” = 0.0839 ft.
4
Assume “N” to be 0.010. Then:
V = 1.486 (0.0839)
0.010
V = 3.2 ft./second
Charlotte Pipe generally recommends a flow velocity of
at least 2.0 feet per second for self-cleaning drain lines.
In both examples shown, the design being evaluated exceeds
this recommendation.
2/3
(0.0125)
1/2
Manning Roughness Factor
(“N” Value)
The Manning “N” value is a commonly used flow coefficient.
This coefficient expresses the “smoothness” of the interior
walls of various types of piping material. The Manning value is
used when making calculations for liquids with a steady flow,
at a constant depth, in a prismatic open channel.
The “N” value for CPVC pipe ranges from 0.008 to 0.012,
making it comparable in smoothness to glass, polypropylene
and PVDF and som ewhat smo other on average than
competitive high-silicon iron systems.
Example 1:
Calculate the gravity flow for a 2”-diameter, Schedule 40
CPVC pipe, flowing full over a 30-foot pipe run with a 7.5inch drop.
S = 17.5”-10.0” / 12” = 0.0208 ft./ft.
30 ft.
R = 2.067” / 12” = 0.043 ft.
4
2/3
V = 1.486 R
N
Manning’s “N” value can range from 0.008 to 0.012.
However, for gravity sewer systems, we generally use 0.009.
V = 1.486 (0.043)
0.009
V = 2.9 ft./second
12
S
1/2
2/3
(0.0208)
1/2
DESIGN AND
ENGINEERING DATA
Fluid Flow Rate
Use the following calculation to determine the volumetric flow
rate. In the equation:
Q = aV
V = Flow velocity in feet/second
a = A cross-sectional area of flow in feet squared (ft.2)
Q = Volume flow rate in cubic feet (ft.3) per second
Example 1
a = πDi2 = π (2.067/12)2 = 0.0233 ft
4 4
V = 2.9 ft/sec
Q = 0.0233 x 2.9 = 0.0676 ft3/sec
Q = 0.0676 ft3 x 7.48 gal x 60 sec = 30.3 gals
sec ft3 min min
Example 2
a = 1/2 ( πDi
4 2 x 4
V = 3.2 ft/sec
Q = 0.0442 x 3.2 = 0.141 ft3/sec
Q = 0.141 ft3 x 7.48 gal x 60 sec = 63.5 gals
sec ft3 min min
(Same scenario as Gravity Flow Example 1 on previous page)
2
(Same scenario as Gravity Flow Example 2 on previous page)
2
) = π (4.026/12)
2
= 0.0442 ft
2
:
:
exPansionand ContraCtionof CPvC
As the temperature varies, CPVC pipe lengths expand and
contract. Typically, CPVC expands five times as much as
steel or iron pipe. When designing a plumbing system to
compensate for thermal expansion and contraction, installation
temperature versus the maximum working temperature must
be considered. Thermal variations in CPVC lengths depend
on three factors:
• The coefficient of linear expansion;
• The length of pipe between directional changes; and
• The temperature differential.
The coefficient of linear expansion (Y) is expressed in inches
of expansion for every 10° F change in temperature over 100
feet of pipe. For CPVC, the value of Y is 0.408.
The amount of expansion or contraction can be calculated
using the following formula:
∆L = Y (T1-T2) x L h
10 100
Where:
∆L = The dimensional change due to ther mal
expansion or contraction in inches.
Y = The expansion coefficient for CPVC (0.408)
T1-T2 = The difference between the temperature at
the time of installation and the maximum or
minimum system temperature, (choose the one
that provides the greatest differential), in °F.
L = The length of pipe run between changes in
direction, in feet.
Example:
How much expansion can be expected in a 60-foot straight run
of ChemDrain® CPVC pipe installed at 70° F and operating
at 140°F?
Solution:
∆L = 0.408 (140-70) x 60 =0.408 x 7 x 0.6 = 1.71 in.
10 100
For vertical stacks in above-grade applications, compensation
for ther mal expansion is recommended . This can be
accomplished by installing a horizontal offset in the piping
system at every other floor. For example, in a three-story
installation, an offset in the piping system at the second floor
would be recommended. Compensation for thermal expansion
is not required for the vent system.
The results, shown in the following table, are presented
simply as a handy guide for quick and easy determinations of
acceptable loop lengths for the approximate conditions.
Failure to compensate for expansion and contraction
caused by temperature change may result in system
failure and property damage.
• Do not restrict expansion or contraction. Restraining
movement in piping systems is not recommended and
may result in joint or fitting failure.
• Use straps or clamps that allow for piping system
movement.
• Align all piping system components properly without
strain. Do not bend or pull pipe into position after being
solvent welded.
• Do not terminate a pipe run against a stationary object
(example: wall or floor joist).
In underground applications, it is easy to compensate for
expansion and contraction by snaking the pipe in the trench.
Solvent-welded joints must be used. See the “Underground
Installation” section for more details.
NOTICE: Due to exothermic reactions which can be caused
by the mixing of chemicals, temperatures within the system
may become elevated. It is important to consider this when
designing for expansion and contraction.
NOTE: This manual is not a complete engineering reference
addressing all aspects of design and installation of thermal
expansion in piping systems. Many excellent references are
available on this topic. The American Society of Plumbing
Engineers (www.ASPE.org) Data Book, Volume 4, 2008,
Chapter 11 is an excellent resource for engineers on designing
for thermal expansion.
sUPPort sPaCingfor CPvC PiPe
Any piping system requires adequate support, and this is
particularly true of flexible piping material such as CPVC.
The size of the pipe, the location of heavy fittings and the
mechanical properties of the piping material all influence the
amount of support needed and the types of hangers that will
work best.
ChemDrain® Technical Manual
The design of a CPVC piping system should follow the same
general principles used to design steel piping systems. However,
there are several notable exceptions:
1. With CPVC, give direct support to concentrated loads
such as flanges to eliminate high-stress concentrations.
If direct support is impossible, support the pipe as close
to the load as possible.
2. If large temperature fluctuations are possible, allow for
expansion and contraction in the length of the pipe in
the design. In most cases, changes in pipe direction will
provide sufficient leeway. However, hangers must not be
allowed to restrict this movement.
3. Where changes in direction occur, provide support as
close as possible to the fitting. This will prevent excessive
stresses that can twist or wrench the system (torsional
stresses).
4. Since CPVC pipe expands approximately 5 times more
than steel, select and install hangers to allow for this
movement. When using a clamp-type hanger, for example,
do not allow the hanger to force the pipe and fittings into
position.
5. Hangers should provide as much load-bearing surface
as possible. To prevent damage to the pipe, file any
sharp edges or burrs on hangers or supports before
installation.
6. Do not place CPVC lines alongside steam or other hightemperature pipe lines or objects.
NOTICE: The above information provides general guidelines.
It should be used only as a reference and not as a guarantee or
performance. Specific installation instructions and techniques
may be required as a result of local plumbing and building
codes, engineering specifications and instructions.
Failure to follow proper installation practices,
procedures, or techniques may result in personal injury,
system failure or property damage.
• Use a solvent cement / primer applicator that is 1/2 the
size of the pipe's diameter. Too large an applicator will
result in excess cement inside the fitting. Too small an
applicator will not apply sufficient cement.
• Cut pipe square.
• Do not use dull or broken cutting tool blades when
cutting pipe.
• Do not test until recommended cure times are met.
• Align all piping system components properly without
strain. Do not bend or pull pipe into position after being
solvent welded.
14
Most plumbing and building codes require horizontal piping
to be supported based on the diameter of the piping material.
Always install support spacing in accordance with applicable
plumbing and building codes.
Properly support vertical CPVC piping for the vertical load
involved. The design should include a mid-story guide, unless
thermal expansion requirements dictate a different approach.
Do not tightly anchor pipe to the supports; instead, secure it
to allow for natural thermal-induced movement.
The following chart shows the recommended support spacing
for ChemDrain® CPVC pipe. This spacing recommendation
applies to continuous spans of un-insulated lines with no
concentrated loads when carrying liquids with a specific gravity
of 1.00 or less.
NOTE: Always follow local code requirements for horizontal
hanger spacing. Most plumbing codes require that CPVC pipe
have a maximum horizontal hanger spacing of not more than
four feet for pipe sizes 11⁄2 inch and larger.
Roller Hanger
21⁄2 to 20 in. pipe
Adj. Swivel Roller Hanger
21⁄2 to 12 in. pipe
Split Ring Hanger
3
⁄8 to 8 in. pipe
Adj. Clevis
For Insulated Lines
3
⁄4 to 12 in. pipe
Pipe Clamp
1
⁄2 to 24 in. pipe
Split Ring Hanger
Adj. Swivel Ring
3
⁄4 to 8 in. pipe
Adj. Swivel Ring
1
⁄2 to 8 in. pipe
Double Bolt Pipe Clamp
3
⁄4 to 36 in. pipe
Single Pipe Roll
1 to 30 in. pipe
Roller Chair
2 to 12 in. pipe
Anchor Strap
1
⁄2 to 4 in. pipe
Adj. Pipe Roll Support
1 to 30 in. pipe
Pipe Roll Stand
2 to 42 in. pipe
U Bolt
1
⁄2 to 30 in. pipe
15
DESIGN AND
ENGINEERING DATA
CheMiCal resistanCe
CPVC is resistant to most acids, bases, salts and a wide variety
of organic compounds; see list of specific chemicals starting
on page 17. Charlotte ChemDrain® CPVC is very well suited
to use in commercial, institutional and academic laboratory
drainage. This chemical resistance data is for CPVC in a
typical laboratory drainage environment. Laboratory drainage
is defined as:
The routine disposal of a wide variety of hot (up to 220°F)
and cold chemicals in relatively small quantities in a gravity
drainage system accompanied by water sufficient for the
purpose of dilution and flushing.
The Chemical Resistance data located in this manual is
for CPVC in a typical laboratory drainage environment.
To reduce the risk of system failure, always evaluate the
chemical resistance information and project specific
factors.
• Laboratory Drainage is defined as: The routine noncontinuous disposal of a wide variety of hot and cold
chemicals in relatively small quantities in a gravity
drainage system accompanied by water sufficient for the
purpose of dilution and flushing.
• Refer to the Plastics Technical and Installation Manual
available at www.charlottepipe.com for chemical
resistance information for industrial or continuous
chemical drainage applications.
• Chemical resistance of plastics is dependent on
concentration, possible interactions with other
chemicals, temperature, stress and other factors.
ChemDrain® Technical Manual
• Failure to follow proper installation practices,
procedures, or techniques may result in system failure,
personal injury and proper ty damage.
• ChemDrain is not recommended for DWV applications.
Important Note:
• Some chemicals that do not normally adversely effect
CPVC can cause environmental stress cracking when
a piping system is exposed to excessive stress. Types of
external stresses include expansion/contraction, improper
support or installation. Tests show that samples under
external stress may exhibit cracking when exposed to
strong surfactants and certain oils and/or animal or
vegetable fats. Special consideration should be taken
during design and installation to avoid unusual stress in
the piping system. CPVC Chemical Waste systems are not
listed nor recommended for sanitary DWV applications.
CPVC can be used for industrial (continuous chemical)
drainage, but for those applications the chemical resistance
charts in the Charlotte® Plastics Technical Manual must
be used. Contact Charlotte Technical Services for more
information or assistance at www.charlottepipe.com. Chemical
resistance data contained in those manuals is provided for
initial compatibility evaluation purposes only. Due to the
many variables involved and possible interaction and mixing
of chemicals within systems, Charlotte recommends that
users test under actual service conditions to determine final
suitability for a particular purpose. This chemical resistance
chart does not represent a warranty for the performance of
CPVC piping systems in any specific application.
16
See www.charlottepipe.com for most current data.
Chemical Resistance
DESIGN AND
ENGINEERING DATA
The following table lists the chemical resistance suitability of CPVC
ChemDrain thermoplastic piping materials and Fluoroelastomer
(FKM), a commonly used seal material. The information shown is
based upon laboratory tests conducted by the manufacturers of the
The chemical resistance table shown within this manual is for
CPVC in a typical laboratory drainage environment. To
reduce the risk of system failure, always evaluate the
chemical resistance information and project specific factors.
materials, and it is intended to provide a general guideline on the
resistance of these materials to various chemicals. NOTICE: This information is not a guarantee, and any piping systems using
products made of these materials should be tested under actual service conditions to determine their suitability for a particular
purpose. See website for most current data: www.charlottepipe.com.
Anti-Freeze: See Alcohols, Glycols and Glycerin
Antimony Trichloride, aqueous RR
Aqua Regia RR
Arsenic Acid RR
Aryl Sulfonic Acid R• •
Asphalt NRR
Barium Carbonate RR
Barium Chloride RR
See www.charlottepipe.com for most current data.
17
DESIGN AND
ENGINEERING DATA
ChemDrain® Technical Manual
Chemical Resistance
The following table lists the chemical resistance suitability of CPVC
ChemDrain thermoplastic piping materials and Fluoroelastomer
(FKM), a commonly used seal material. The information shown is
based upon laboratory tests conducted by the manufacturers of the
materials, and it is intended to provide a general guideline on the
resistance of these materials to various chemicals. NOTICE: This information is not a guarantee, and any piping systems using
products made of these materials should be tested under actual service conditions to determine their suitability for a particular
purpose. See website for most current data: www.charlottepipe.com.
The chemical resistance table shown within this manual is for
CPVC in a typical laboratory drainage environment. To
reduce the risk of system failure, always evaluate the
chemical resistance information and project specific factors.
The following table lists the chemical resistance suitability of CPVC
ChemDrain thermoplastic piping materials and Fluoroelastomer
(FKM), a commonly used seal material. The information shown is
based upon laboratory tests conducted by the manufacturers of the
The chemical resistance table shown within this manual is for
CPVC in a typical laboratory drainage environment. To
reduce the risk of system failure, always evaluate the
chemical resistance information and project specific factors.
materials, and it is intended to provide a general guideline on the
resistance of these materials to various chemicals. NOTICE: This information is not a guarantee, and any piping systems using
products made of these materials should be tested under actual service conditions to determine their suitability for a particular
purpose. See website for most current data: www.charlottepipe.com.
The following table lists the chemical resistance suitability of CPVC
ChemDrain thermoplastic piping materials and Fluoroelastomer
(FKM), a commonly used seal material. The information shown is
based upon laboratory tests conducted by the manufacturers of the
materials, and it is intended to provide a general guideline on the
resistance of these materials to various chemicals. NOTICE: This information is not a guarantee, and any piping systems using
products made of these materials should be tested under actual service conditions to determine their suitability for a particular
purpose. See website for most current data: www.charlottepipe.com.
The chemical resistance table shown within this manual is for
CPVC in a typical laboratory drainage environment. To
reduce the risk of system failure, always evaluate the
chemical resistance information and project specific factors.
The following table lists the chemical resistance suitability of CPVC
ChemDrain thermoplastic piping materials and Fluoroelastomer
(FKM), a commonly used seal material. The information shown is
based upon laboratory tests conducted by the manufacturers of the
The chemical resistance table shown within this manual is for
CPVC in a typical laboratory drainage environment. To
reduce the risk of system failure, always evaluate the
chemical resistance information and project specific factors.
materials, and it is intended to provide a general guideline on the
resistance of these materials to various chemicals. NOTICE: This information is not a guarantee, and any piping systems using
products made of these materials should be tested under actual service conditions to determine their suitability for a particular
purpose. See website for most current data: www.charlottepipe.com.
The following table lists the chemical resistance suitability of CPVC
ChemDrain thermoplastic piping materials and Fluoroelastomer
(FKM), a commonly used seal material. The information shown is
based upon laboratory tests conducted by the manufacturers of the
materials, and it is intended to provide a general guideline on the
resistance of these materials to various chemicals. NOTICE: This information is not a guarantee, and any piping systems using
products made of these materials should be tested under actual service conditions to determine their suitability for a particular
purpose. See website for most current data: www.charlottepipe.com.
The chemical resistance table shown within this manual is for
CPVC in a typical laboratory drainage environment. To
reduce the risk of system failure, always evaluate the
chemical resistance information and project specific factors.
The following table lists the chemical resistance suitability of CPVC
ChemDrain thermoplastic piping materials and Fluoroelastomer
(FKM), a commonly used seal material. The information shown is
based upon laboratory tests conducted by the manufacturers of the
The chemical resistance table shown within this manual is for
CPVC in a typical laboratory drainage environment. To
reduce the risk of system failure, always evaluate the
chemical resistance information and project specific factors.
materials, and it is intended to provide a general guideline on the
resistance of these materials to various chemicals. NOTICE: This information is not a guarantee, and any piping systems using
products made of these materials should be tested under actual service conditions to determine their suitability for a particular
purpose. See website for most current data: www.charlottepipe.com.
The following table lists the chemical resistance suitability of CPVC
ChemDrain thermoplastic piping materials and Fluoroelastomer
(FKM), a commonly used seal material. The information shown is
based upon laboratory tests conducted by the manufacturers of the
materials, and it is intended to provide a general guideline on the
resistance of these materials to various chemicals. NOTICE: This information is not a guarantee, and any piping systems using
products made of these materials should be tested under actual service conditions to determine their suitability for a particular
purpose. See website for most current data: www.charlottepipe.com.
Water - Deionized RR
Whiskey RR
White Liquor RR
Wine RR
Xylene NRR
The chemical resistance table shown within this manual is for
CPVC in a typical laboratory drainage environment. To
reduce the risk of system failure, always evaluate the
chemical resistance information and project specific factors.
For temperatures not shown, the following formulas apply:
°F to °C = (°F-32)/1.8 °C to °F = 9/5 (°C x 1.8) +32
MetriC Conversion
Pipe Size (mm)
6mm
7mm
8mm
10mm
15mm
18mm
20mm
25mm 1 in. 350mm 14 in.
32mm 11⁄4 in. 400mm 16 in.
40mm 11⁄2 in. 450mm 18 in.
50mm 2 in. 500mm 20 in.
65mm 21⁄2 in. 600mm 24 in.
80mm 3 in.
To the best of our knowledge the information contained in this publication is accurate. However, Charlotte Pipe and Foundry
does not assume any liability whatsoever for the accuracy or completeness of such information. Final determination of
the suitability of any information or product for any use is the sole responsibility of the user. The manner of that use and
whether there is any infringement of patents is also the sole responsibility of the user.
Pipe Size (in.)Pipe Size (mm)Pipe Size (in.)
1
⁄8 in. 90mm 31⁄2 in.
3
⁄16 in. 100mm 4 in.
1
⁄4 in. 125mm 5 in.
3
⁄8 in. 150mm 6 in.
1
⁄2 in. 200mm 8 in.
5
⁄8 in. 250mm 10 in.
3
⁄4 in. 300mm 12 in.
25
DESIGN AND
ENGINEERING DATA
ChemDrain® Technical Manual
the Conversionof fraCtionsto deCiMals
Fraction Decimal Fraction Decimal
1/64 0.015625 33/64 0.515625
1/32 0.031250 17/32 0.53125
3/64 0.046875 35/64 0.546875
1/16 0.062500 9/16 0.5625
5/64 0.078125 37/64 0.578125
3/32 0.937500 19/32 0.59375
7/64 0.109375 38/64 0.609375
1/8 0.125000 5/8 0.625
9/64 0.140625 41/64 0.640625
5/32 0.156250 21/32 0.65625
11/64 0.171900 43/64 0.67187
3/16 0.187500 11/16 0.6875
13/64 0.203100 45/64 0.70312
7/32 0.218800 23/32 0.71875
15/64 0.234375 47/64 0.734375
1/4 0.250000 3/4 0.75
17/64 0.265625 49/64 0.765625
9/32 0.281250 25/32 0.78125
19/64 0.296875 51/64 0.79875
5/16 0.312500 13/16 0.8125
21/64 0.328125 53/64 0.82125
11/32 0.343750 27/32 0.84375
23/64 0.359375 55/64 0.859375
3/8 0.375000 7/8 0.875
25/64 0.398625 57/64 0.890625
13/32 0.406250 29/32 0.90625
27/64 0.421875 59/64 0.921875
7/16 0.437500 15/16 0.9375
29/64 0.453125 61/64 0.953125
15/32 0.468750 31/32 0.96875
31/64 0.484375 63/64 0.984375
1/2 0.500000 1” 1
26
INSTALLATION PROCEDURES
ConneCtion oPtions
The ChemDrain® System offers several options for joining
CPVC pipe and fittings and joining CPVC to a wide variety of
alternative materials. All of the approved options available
for use in a ChemDrain system are outlined here, including
solvent welding, flanged connections and ChemDrain Chemical
Couplings.
Failure to follow proper installation practices,
procedures, or techniques may result in personal injury,
system failure or property damage.
• Use a solvent cement / primer applicator that is 1/2 the
size of the pipe's diameter. Too large an applicator will
result in excess cement inside the fitting. Too small an
applicator will not apply sufficient cement.
• Cut pipe square.
• Do not use dull or broken cutting tool blades when
cutting pipe.
• Do not test until recommended cure times are met.
Exclusive Charlotte Pipe TrueFit® System
Only Charlotte offers the TrueFit System. Our CPVC pipe,
fittings, bushings, and tees are made to exacting tolerances,
meaning everything is designed to fit together properly. Using
our products, you’ll work more efficiently and productively
with fewer callbacks.
Advantages of Solvent Welding
One major advantage of CPVC for chemical waste disposal
applications is its use of chemically welded joints. Solvent
welding is a simple, consistent and reliable method of creating
joints that requires no special tools or costly fusion equipment.
ChemDrain CPVC Cement is specifically formulated for
chemical waste applications. The resulting joints are as strong
and durable as the pipe itself, with the same chemical resistance
and physical properties as the pipe and fittings.
This is in sharp contrast to mechanical connectors or heatfusion methods, which often burn through or are left exposed
to the flow of corrosive chemicals, which may cause a leak path
to develop over time.
Although the material used to create solvent welds commonly
is referred to as “cement,” it has none of the properties of
cement. It is neither glue nor an adhesive. Instead the process
commonly known as “solvent welding” chemically fuses the
pipe and the fitting material by temporarily softening the two
pieces to create semi-fluid surfaces. Wedging the treated pipe
into a softened, tapered fitting socket forces the two semi-fluid
surfaces together and allows them to chemically fuse as the
CPVC re-hardens. As the solvent evaporates, or cures, the final
fused joint is created. To avoid confusion, Charlotte Pipe refers
to this process exclusively as “solvent welding.”
Charlotte Pipe recommends only Charlotte Pipe and Foundry
ChemDrain CPVC Cement for use in ChemDrain applications.
ChemDrain CPVC Cement is specially formulated for chemical
resistance to caustics including hypochlorites, mineral acids
and other corrosive chemicals. The other joining options for the
ChemDrain system are described in the following installation
procedures.
27
INSTALLATION PROCEDURES
ChemDrain® Technical Manual
installation ProCedUresfor CheMdrain®
CPvC systeMs
Failure to follow safety precautions may result in
misapplication or improper installation and testing which
can cause severe personal injury and / or property damage.
Failure to follow proper installation practices,
procedures, or techniques may result in personal injury,
system failure or property damage.
• Use a solvent cement / primer applicator that is 1/2 the
size of the pipe's diameter. Too large an applicator will
result in excess cement inside the fitting. Too small an
applicator will not apply sufficient cement.
• Cut pipe square.
• Do not use dull or broken cutting tool blades when
cutting pipe.
• Do not test until recommended cure times are met.
Basic Principles of Solvent Welding
To make consistently good joints the following should be clearly
understood:
1. The joining surfaces must be softened and made semifluid.
2. Sufficient cement must be applied to fill the gap between
pipe and fitting.
3. Assembly of pipe and fittings must be made while the
surfaces are still wet and fluid.
4. Joint strength develops as the cement dries. In the tight
part of the joint the surfaces will fuse together, in the loose
part the cement will bond to both surfaces.
• Using an external heat source to bend CPVC may result
in structural damage to pipe and fittings.
• Always make changes in direction with fittings.
Solvent Cements
Failure to follow safety precautions may result in
misapplication or improper installation and testing which
can cause severe personal injury and / or property damage.
Primers and cements are extremely flammable and may
be explosive. Do not store or use near heat or open
flame, or death or serious injury may occur.
• Solvent fumes created during the joining process are
heavier than air and may be trapped in newly installed
piping systems.
• Ignition of the solvent vapors caused by spark or flame
may result in injury or death from explosion or fire.
• Read and obey all manufacturers' warnings and any
instructions pertaining to primers and cements.
• Provide adequate ventilation to reduce fire hazard and
to minimize inhalation of solvent vapors when working
with cements, primers and new piping systems.
ChemDrain chemical waste systems must be joined with
ChemDrain one-step solvent cement conforming to ASTM F
493.
Charlotte ChemDrain solvent cement is classified as “LowVOC” (volatile organic compounds) per the emission limits
established by the California South Coast Air Quality
Management District (SCAQMD). Material Safety Data Sheets
(MSDS) for Charlotte ChemDrain solvent cement are available
for download at www.charlottepipe.com.
Solvent cements are formulated to be used “as received” in
original containers. Adding of thinners to change viscosity is
not recommended. If the cement is found to be jelly-like and
is not free-flowing, it should not be used. Containers should
be kept covered when not in actual use.
Solvent cements should be stored at temperatures between 40°
F and 110° F and away from heat or open flame. The cements
should be used within two years of the date stamped on the
container. Stocks should be constantly rotated to prevent buildup of old cement inventories. If new cement is subjected to
freezing, it may become extremely thick or gelled. This cement
can be placed in a warm area where, after a period of time, it
will return to its original, usable condition. However, this is not
the case when the cement has gelled due to actual solvent loss;
for example, when the container was left open too long during
use or not sealed properly after use. Cement in this condition
has lost its formulation and should be discarded.
Solvent cements are extremely flammable and should not
be used or stored near heat or open flame. They should be
28
INSTALLATION PROCEDURES
used only with adequate ventilation. In confined or partially
enclosed areas, a ventilating device should be used to remove
vapors and minimize their inhalation. Containers should be
kept tightly closed when not in use and covered as much as
possible when in use. Avoid frequent contact with the skin. In
case of eye contact, flush repeatedly with water. Keep out of
reach of children.
Making the Joint
1. Cut Pipe
• Cut the pipe square
with the axis. All
joints are sealed
at the base of
the fitting hub.
An angled cut
may result in joint
failure.
• Acceptable tools
include miter saw,
reciprocation saw,
and mechanical
cut-off saw with
carbide-tipped blade or wheel-type pipe cutter.
• If any indication of damage or cracking is evident at the
pipe end, cut off at least 2” beyond any visible cracks.
2. Remove Burrs and
Bevel
• Remove all pipe
burrs from inside
and outside
diameter of pipe
with a knife edge,
file or de-burring
tool.
1
2
3. Clean and Dry
Pipe and Fittings
• Remove surface dirt,
grease or moisture
with a clean dry
cloth.
• If the wiping fails to
clean the surfaces,
use a compatible
cleaner.
4. Dry Fit
• With light pressure,
pipe should go one
half to one third
of the way into the
fitting hub. Pipe and
fittings that are too
tight or too loose
should not be used.
5. Applicator
• Use an applicator that is one half the size of the pipe’s
diameter. Daubers, natural bristle brushes or swabs are
recommended. Rollers are not recommended.
• Too large an applicator will force excess cement into the
inside of the fitting. Too small an applicator will not apply
sufficient cement.
3
4
• Chamfer (bevel) the
end of the pipe 10°
– 15°.
Failure to follow safety precautions may result in
misapplication or improper installation and testing which
can cause severe personal injury and / or property damage.
Primers and cements are extremely flammable and may
be explosive. Do not store or use near heat or open
flame, or death or serious injury may occur.
• Solvent fumes created during the joining process are
heavier than air and may be trapped in newly installed
piping systems.
• Ignition of the solvent vapors caused by spark or flame
may result in injury or death from explosion or fire.
• Read and obey all manufacturers' warnings and any
instructions pertaining to primers and cements.
• Provide adequate ventilation to reduce fire hazard and
to minimize inhalation of solvent vapors when working
with cements, primers and new piping systems.
29
INSTALLATION PROCEDURES
ChemDrain® Technical Manual
6. Apply Solvent Cement and Primer
NOTE: The ChemDrain one-step cement procedure does
not normally require the use of a primer on clean, dry pipe
and fittings in sizes 1 ½” to 4”. On 6” and 8” sizes or in
wet, very cold (40°F or less), or very hot (90°F and higher)
conditions the use of a quality high-strength primer such
as IPS Weld-on P70, Oatey “Industrial Grade” or equal is
recommended to ensure a well-bonded joint.
If using a primer:
• Apply primer to the fitting socket by aggressively working it
into the surface.
• Apply primer to the pipe surface to a point ½” beyond the
hub depth. Aggressively work the primer into the surface.
• Apply a second coat of primer to the fitting socket,
aggressively working it into the surface.
• Once the surface is primed remove all puddles of excess
primer from the fitting socket.
Apply Cement
• Stir or shake the
cement prior to use.
• Apply a full even
layer of cement to
the pipe surface to
a point ½” beyond
the hub depth.
Aggressively work
the cement into the
surface of the pipe.
• Without re-dipping
the applicator in
the cement, apply
a thin layer of
cement to the fitting
socket, aggressively
working it into the
surface.
• Do not allow
cement to puddle or
accumulate inside
the system.
• Solvent cement
should conform to ASTM F 493. All-purpose cement or
cement not clearly marked as intended for CPVC Chemical
Waste Systems is not recommended.
6
7. J o i n P i p e a n d
Fittings
• Assemble pipe and
fittings quickly
while cement is
fluid. If cement has
hardened, cut pipe,
dispose of fitting
and start over.
• While inserting pipe
into fitting hub give
the pipe a quarter
turn which helps
ensure an even distribution of cement within the joint.
• Once the pipe contacts the socket bottom hold pipe and
fitting together until the pipe does not back out.
• See table on following page for recommended set and cure
times.
• Remove excess
cement from the
exterior. A properly
made joint will show
a continuous bead of
cement around the
perimeter. If voids
appear sufficient
cement may not
have been applied
and joint failure
may result.
• For pipe sizes 6” and larger, two people will be required,
a mechanical forcing device should be used and the joint
should be held together for up to 3 minutes.
7
Applicators
To properly apply the cement, the correct size and type
of applicator must be used. There are three basic types of
applicators:
Daubers — should only be used on pipe sizes 2” and
below, and should have a width equal to 1/2
the diameter of the pipe.
Brushes — can be used on any diameter pipe, should
always have natural bristles, and should
have a width equal to at least 1/2 the
diameter of the pipe.
Swabs — can be used on 4” and larger diameter pipe
and should have a length equal to at least
1/2 the diameter of the pipe.
30
INSTALLATION PROCEDURES
Applicator Type
Nominal Pipe
Size (in.)
DauberBrush Width (in.)
11⁄2A 1 - 11⁄2NR
2 A 1 - 11⁄2NR
21⁄2NR 11⁄2 - 2 NR
3 NR 11⁄2 - 21⁄2NR
4 NR 2 - 3 3
5 NR 3 - 5 3
6 NR 3 - 5 3
8 NR 4-6 7
A = Acceptable NR = Not Recommended
Applicator Type
Swab Length (in.)
Joint Curing
The joint should not be disturbed until it has initially set.
CAUTION: Do not test the system until the solvent cement
joints have fully cured. Follow the recommendations in Testing a
ChemDrain CPVC System on page 36 of this technical manual.
The exact curing time varies with temperature, humidity and
pipe size. The following chart shows recommended set and cure
times.
Recommended Set and Cure Time
Temperature Initial Set Cure
60° - 100° F 30 min. 1 hr.
40° - 60° F 1 hr. 2 hrs.
0° - 40° F 2 hrs. 4 hrs.
*For relative humidity above 60%, allow 50% more cure time.
Average Number of Joints Per Quart of Solvent Cement
Pipe Diameter (in.) Number of Joints
11⁄22 60
3 40
4 30
6 10
8 5
The above data are based on laboratory tests and are intended
as guidelines. For more specific information, consult the cement
manufacturer.
• Exceeding recommended flange bolt torque may result in
component damage, system failure and property damage.
• Use the proper bolt tightening sequence as marked on the
flange.
• Make sure the system is in proper alignment.
• Flanges may not be used to draw piping assemblies
together.
• Flat washers must be used under every nut and bolt head.
• Ensure that the mating surfaces are in direct contact. A gap
between the flange face and mating surface may result in
flange failure.
90
Flanging CPVC Pipe
For systems where dismantling is required, flanging is a
convenient joining method. It is also an easy way to join plastic
and metallic systems.
Installation
1. Join the flange to
the pipe using the
procedures shown
in t h e s ol v en t
cementing section
(pages 29-31).
2. Use a full faced
e l a s t o m e r i c
gasket which is
resis tant to the
chemicals being
conveyed in the piping system. A gasket 1/8” thick with
a Durometer, scale “A”, hardness of 55 -80 is normally
satisfactory.
3. Align the flanges
an d ga s ket by
inserting all of the
bolts through the
mating flange bolt
holes. Be sure to
use properly sized
flat washers under
all bolt heads and
nuts.
4. S e q u e n t i a l l y
tighten the bolts
corresponding to the following patterns shown.
5. Use a torque wrench to tighten the bolts to the torque values
shown in the following chart.
Note: Flanges meet the bolt-pattern requirements of ANSI / ASME B 16.5
1 foot pound = 12 inch pounds
1
⁄210 - 15
5
⁄820 - 30
5
⁄820 - 30
5
⁄820 - 30
5
⁄820 - 30
3
⁄433 - 50
3
⁄433 - 50
31
INSTALLATION PROCEDURES
ChemDrain® Technical Manual
Flange Bolt Tightening Sequence
Connecting CPVC to Other Materials
Occasionally, it is necessary to connect ChemDrain® CPVC
piping systems to piping systems made of other materials,
including steel, cast iron, Durion®, glass and other types of
plastic. In these cases, Charlotte Pipe recommends the use
of ChemDrain Chemical Couplings (known generically as
“hubless joints”).
ChemDrain Chemical Couplings are designed to provide
flexible, water-tight joints on chemical drainage systems. They
consist of a high-performance fluoroelastomer sleeve, an outer
stainless steel shear ring and two AISI 301 stainless steel
clamping bands. The fluoroelastomer gasket is resistant to
most chemicals and solvents and features a low compression
set and stress relaxation properties that helps to ensure sealing
performance and longevity. Fluoroelastomer gaskets have
a broad thermal range and provide excellent resistance to
atmospheric oxidation, weathering, sunlight and ozone.
• Using an external heat source to bend CPVC may result
in structural damage to pipe and fittings.
• Always make changes in direction with fittings.
• For sizes 1-1/2” through 6”, coupling has two bands.
Take the slack out of the clamp alternately and firmly,
then tighten in the same sequence with a preset torque
wrench to 60 inch-pounds.
Installation of Threaded Connections
1. Make sure the threads are clean. Charlotte Pipe
recommends Teflon* tape as a sealant for threaded
connections. Use a good quality Teflon tape which has
.4 minimum density .003” thick, .50% elongation and
chemically inert. Wrap the Teflon tape around the entire
length of the threads; start with two wraps at the end and
wrap all threads overlapping half the width of the tape.
Wrap in the direction of the threads on each wind.
*Trademark of the E.I. DuPont Company
NOTICE: Charlotte does not recommend pipe joint
compounds, pastes or lubricants for thermoplastic pipe
as the use of an incompatible compound may result in
the degradation or failure of the plastic pipe or fittings.
If using one of these compounds as a thread sealant,
always verify with the manufacturer of those compounds
the suitability for use with CPVC.
Pipe or fittings may be damaged by contact with
products containing incompatible chemicals resulting in
personal injury or property damage.
• Verify that paints, thread sealants, lubricants, plasticized
PVC products, foam insulations, caulks, leak detectors,
insecticides, termiticides, antifreeze solutions, pipe
sleeve, firestop materials or other materials are
chemically compatible with CPVC.
• Do not use edible oils such as Crisco
®
for lubricant.
Making Joints with ChemDrain Chemical
Couplings
1. Place the Fluoroelastomer sleeve on the end of the pipe or
fitting, firmly seating the pipe or fitting end against the
integrally molded shoulder inside the sleeve. Next, place
the stainless-steel shield on the other component you’re
joining.
2. Insert the other component you’re joining into the other
side of the Fluoroelastomer sealing sleeve, firmly seating
the pipe or fitting end against the integrally-molded
shoulder inside the sleeve.
3. Sli de the clam p assembly into positio n ove r the
Fluoroelastomer sleeve, and use the following procedures
to tighten the bands to 60 inch-pounds, using a properly
calibrated torque wrench.
32
2. Make threaded connections and hand tighten. Further
tighten approximately one turn past hand tight using a
strap wrench only. Do not use common wrenches or tools
designed for metallic pipe systems.
Exceeding recommended torque for threaded connections
may result in component damage, system failure and
property damage.
CPVC pipe and fittings can be installed underground, provided
the pipe is:
• Adequately supported;
• Protected from contact with sharp rock and debris; and
• Given sufficient room for temperature-induced expansion
and contraction.
An underground CPVC system is affected by conditions such
as sidewall support, soil compaction and the condition of the
trench. For adequate support, ensure that trench bottoms are
smooth and regular and consist of either undisturbed soil or a
layer of compacted backfill. Eliminate rocks and debris from
subsoil. If large boulders are present, cushion the trench with
sand or fine-grained soil to protect the pipe. Install pipe so
that its weight is evenly supported by the subsurface along its
entire length. Solvent weld all joints.
Ensure that excavation, bedding and backfill comply with
applicable plumbing and building codes. Properly test the
system in accordance with applicable plumbing codes prior
to backfilling. Backfill material that touches the pipe should
consist of particles 1/2” inch or less in size. Ensure that
this material is free of sharp rock or debris and uniformly
compacted in layers. Where pipe must pass through masonry
walls, install a larger-diameter pipe as a protective sleeve.
4. To prevent damage to the pipe and disturbance to pipe
embedment, a minimum depth of backfill above the pipe
should be maintained before allowing vehicles or heavy
construction equipment to traverse the pipe trench. Pipe
should always be installed at least below the frost level.
The minimum depth of cover should be established by
the design engineer based upon an evaluation of specific project conditions. In the absence of an engineering
evaluation, Charlotte Pipe recommends referring to Section 7.6 in ASTM D 2321, “Underground Installation of
Thermoplastic pipe for Sewers and Other Gravity-Flow
Applications.”
1. Excavate the trench in accordance with applicable codes
and regulations, ensuring that the sides will be stable
under all working conditions.
2. The trench should be wide enough to provide adequate
room for the following:
a. Joining the pipe in the trench;
b. Snaking the pipe from side to side to compensate for
expansion and contraction if required; and
c. Filling and compacting the side fills.
The space between the pipe and trench wall must be wider
than the compaction equipment used in the compaction of the
backfill. Minimum width shall be not less than the greater of
either the pipe outside diameter plus 16 inches or the pipe
outside diameter times 1.25 plus 12 inches. Trench width
may be different if approved by the design engineer.
3. Install foundation and bedding as required by the engineer according to conditions in the trench bottom.
Provide firm, stable and uniform bedding for the pipe
barrel and any protruding feature of its joint. Provide a
minimum of 4 inches of bedding unless rock or unyielding material is encountered in the bottom of the trench
in which case a minimum of 6 inches of bedding shall be
used. For more severe conditions the guidelines in ASTM
D 2321 should be followed. Blocking should not be used
to change pipe grade or to intermittently support pipe
over low sections in the trench.
Note: This manual is not a complete engineering reference
addressing all aspects of design and installation of thermal
expansion in piping systems. Many excellent references are
available on this topic. The American Society of Plumbing
Engineers (www.ASPE.org) Data Book, Volume 4, 2008
Chapter 11 is an excellent resource for engineers on designing
for thermal expansion.
34
INSTALLATION PROCEDURES
Bedding and Backfilling
1. Even though sub-soil conditions vary widely from place
to place, the pipe backfill should be stable and provide
protection for the pipe.
2. The pipe should be surrounded with an aggregate material which is easily worked around the sides of the pipe.
Backfilling should be performed in layers of 6 inches
with each layer being sufficiently compacted to 85% to
95% compaction.
3. A mechanical tamper is recommended for compacting
sand and gravel backfill which contains a significant proportion of fine grained material, such as silt and clay. If
a tamper is not available, compacting should be done by
hand.
4. The trench should be completely filled. The backfill
should be placed and spread in uniform layers to prevent
any unfilled spaces or voids. Large rocks, stones, frozen
clods or other large debris should be removed. Heavy
tampers or rolling equipment should only be used to con-
solidate the final backfill only.
Additional information is contained in ASTM D 2321
“Underground Installation of Thermoplastic Pipe for
Sewers and Other Gravity-Flow Applications” (non-pressure
applications) and in ASTM F 1668 “Construction Procedures
for Buried Plastic Pipe.” ASTM Standards are copywrited
documents and can be purchased from ASTM International:
100 Barr Harbor Drive West Conshohocken, PA 19428 or
www.astm.org.
Note: This section is a general reference guide and should not
be considered a complete engineering resource addressing all
aspects of design and installation of pipe in buried applications. Charlotte Pipe recommends that a design professional
us this manual along with other industry references taking
into account sub-surface conditions unique to each project
and that all installations be made in accordance with the requirements found in ASTM D 2321 and in compliance with
local code requirements.
35
TESTING AND INSPECTION
compressed air or gas in PVC / ABS / CPVC
ChemDrain® Technical Manual
Testing a ChemDrain® CPVC System
It is important to test and inspect all plumbing for leaks before
covering the system with drywall or other permanent materials.
Charlotte Pipe and Foundry recommends hydrostatic (water)
testing as this is the best option to identify even small leaks
while reducing the risk of injury to installation personnel.
In accordance with PPFA User Bulletin 4-80 and ASTM
D 1785, Charlotte Pipe strenuously discourages air or gas
testing. WARNING: Pipe and fitting material under air or gas
pressure can explode, causing serious injury or death. Because
Charlotte Pipe has specifically warned against the dangers of
air or gas testing, it will not be responsible or liable for injury
or death to persons or damage to property or for claims for
labor and/or material arising from any alleged failure of our
products during testing with air or compressed gases.
Testing with or use of compressed air or gas in PVC / ABS
/ CPVC pipe or fittings can result in explosive failures and
cause severe injury or death.
• NEVER test with or transport/store
pipe or fittings.
• NEVER test PVC / ABS / CPVC pipe or
fittings with compressed air or gas, or air
over water boosters.
• ONLY use PVC / ABS / CPVC pipe for water
or approved chemicals.
• Refer to warnings in PPFA User Bulletin
4-80 and ASTM D 1785.
Test CPVC pipe hydrostatically in accordance with applicable
plumbing and building codes. Bleed all air from the lines at
the highest point before pressurizing. WARNING: Failure to
bleed trapped air may give faulty test results and may result
in an explosion.
Hydrostatic Test
A water or hydrostatic test is the best option for inspecting the
installation of a completed plastic piping system. It also is the
test most often recommended in local plumbing codes.
The purpose of the test is to locate any leaks in joints and
correct them prior to putting the system into service. Since it
is important to be able to visually inspect the joints, conduct
a water test prior to closing off access to interior piping or
backfilling underground piping.
To isolate each floor or section being tested, insert test plugs
through test tees in the stack. Plug or cap all other openings
with test plugs or test caps. Adequately anchor the piping
system to limit movement caused by the thrust forces of water
under pressure. Provide thrust blocking at changes of direction,
changes of size and dead ends.
From the highest opening, fill the system to be tested with
water. As water fills a vertical pipe, it creates hydrostatic
pressure. The pressure increases as the height of the water
in the vertical pipe increases. Charlotte Pipe recommends
testing at 10 feet of hydrostatic pressure (4.3 pounds per
square inch).
Fill the system slowly (flow velocity should not exceed 5 feet
per second) to allow any air in the system to escape as water
rises in the pipe. Expel all trapped air from the system before
the test begins. Failure to remove entrapped air may yield
faulty results.
WARNING: Trapped air is extremely dangerous and may cause
explosion resulting in death or serious injury; always slowly
and completely vent system prior to testing. To facilitate the
removal of trapped air, provide vents at all high points of the
piping system. Open all valves and air-relief mechanisms so
that the air can be vented while the system is being filled. Once
the stack is filled to 10 feet of head, make a visual inspection
of the section being tested.
If a leak is found, cut out the joint and replace it with a
new section. Once a portion of the system has been tested
successfully, drain it to allow the next section to be tested.
Entrapped Air
• Pressure surges associated with entrapped air may
result in serious personal injury, system failure, and
property damage.
• Install air relief valves at the high points in a system to
vent air that accumulates during service.
• Failure to bleed trapped air may give faulty test results
and may result in an explosion.
36
In any test, proper safety procedures and equipment
should be used, including personal protective equipment
such as protective eyewear and clothing. Installers
should always consider local conditions, codes and
regulations, manufacturer's installation instructions, and
architects'/engineers' specifications in any installation.
LIMITED WARRANTY
Charlotte Pipe and Foundry Company® (Charlotte Pipe®)
Products are warranted to be free from manufacturing defects
and to conform to currently applicable ASTM standards for a
period of five (5) years from date of delivery. Buyer’s remedy
for breach of this warranty is limited to replacement of, or
credit for, the defective product. This warranty excludes any
expense for removal or reinstallation of any defective product
and any other incidental, consequential, or punitive damages.
This limited warranty is the only warranty made by seller
and is expressly in lieu of all other warranties, express
and implied, including any warranties of merchantability
and fitness for a particular purpose. No statement, conduct
or description by Charlotte Pipe or its representative, in
addition to or beyond this Limited Warranty, shall constitute
a warranty. This Limited Warranty may only be modified in
writing signed by an officer of Charlotte Pipe.
This Limited Warranty will not apply if:
1) The Products are used for purposes other than their
intended purpose as defined by local plumbing and building
codes, and the applicable ASTM standard.
2) The Products are not installed in good and workmanlike
manner consistent with normal industry standards;
installed in compliance with the latest instr uctions
published by Charlotte Pipe and good plumbing practices;
and installed in conformance with all applicable plumbing,
fire and building code requirements.
3) This limited warranty does not apply when the products
of Charlotte Pipe are used with the products of other
manufacturers that do not meet the applicable ASTM or
CISPI standards or that are not marked in a manner to
indicate the entity that manufactured them.
4) The Products fail due to defects or deficiencies in design,
engineering, or installation of the piping system of which
they are a part.
5) The Products have been the subject of modification;
misuse; misapplication; improper maintenance or repair;
damage caused by the fault or negligence of anyone other
than Charlotte Pipe; or any other act or event beyond the
control of Charlotte Pipe.
6) The Products fail due to the freezing of water in the
Products.
7) The Products fail due to contact with chemical agents,
fire stopping materials, thread sealant, plasticized vinyl
products, or other aggressive chemical agents that are
not compatible.
8) Pipe outlets, sound attenuation systems or other devices
are permanently attached to the surface of Charlotte®
PVC, ABS or CPVC products with solvent cement or
adhesive glue.
Charlotte Pipe products are manufactured to the applicable
ASTM or CISPI standard. Charlotte Pipe and Foundry
cannot accept responsibility for the performance, dimensional
accuracy, or compatibility of pipe, fittings, gaskets, or
couplings not manufactured or sold by Charlotte Pipe and
Foundry.
Any Charlotte Pipe products alleged to be defective must be
made available to Charlotte Pipe at the following address for
verification, inspection and determination of cause:
Charlotte Pipe and Foundry Company
Attention: Technical Services
2109 Randolph Road
Charlotte, North Carolina 28207
Purchaser must obtain a return materials authorization
and instructions for return shipment to Charlotte Pipe of any
product claimed defective or shipped in error.
Any Charlotte Pipe product proved to be defective in
manufacture will be replaced F.O.B. point of original delivery,
or credit will be issued, at the discretion of Charlotte Pipe.
4/15/10
Testing with or use of compressed air or gas in PVC / ABS
/ CPVC / Cast Iron pipe or fittings can result in explosive
failures and cause severe injury or death.
• NEVER test with or transport/store
compressed air or gas in PVC / ABS /
CPVC / Cast Iron pipe or fittings.
• NEVER test PVC / ABS / CPVC / Cast
Iron pipe or fittings with compressed
air or gas, or air over water boosters.
• ONLY use PVC / ABS / CPVC / Cast Iron
pipe for water or approved chemicals.
• Refer to warnings in PPFA User Bulletin
4-80 and ASTM D 1785.
PO Box 35430 Charlotte, NC 28235 USA 704/348-6450 800/438-6091 FAX 800/553-1605
www.charlottepipe.com
Charlotte and Charlotte Pipe are registered trademarks of Charlotte Pipe and Foundry Company.
37
REFERENCE STANDARDS
REFERENCE STANDARDS FOR CHEMDRAIN
ASTM INTERNATIONAL
ASTM TITLE
ASTM D 635 STANDARD TEST METHOD FOR RATE OF BURNING AND/OR EXTENT AND TIME OF BURNING
OF PLASTICS IN A HORIZONTAL POSITION
SCOPE: THIS FIRE-TEST-RESPONSE TEST METHOD COVERS A SMALL-SCALE LABORATORY
SCREENING PROCEDURE FOR COMPARING THE RELATIVE LINEAR RATE OF BURNING OR
EXTENT AND TIME OF BURNING, OR BOTH, OF PLASTICS IN THE HORIZONTAL POSITION.
ASTM D 1784SPECIFICATION FOR RIGID POLY (VINYL CHLORIDE) (PVC) COMPOUNDS AND
SCOPE: THIS SPECIFICATION COVERS RIGID PVC AND CPVC COMPOUNDS INTENDED FOR
GENERAL PURPOSE USE IN EXTRUDED OR MOLDED FORM.
ASTM F 493SPECIFICATION FOR SOLVENT CEMENTS FOR CHLORINATED POLY (VINYL CHLORIDE)
(CPVC) PLASTIC PIPE AND FITTINGS
SCOPE: THIS SPECIFICATION PROVIDES REQUIREMENTS FOR CPVC SOLVENT CEMENT TO BE
USED IN JOINING CPVC PIPE AND SOCKET TYPE FITTINGS.
ChemDrain® Technical Manual
ASTM F 2618SPECIFICATON FOR CHLORINATED POLY (VINYL CHLORIDE) CPVC PLASTIC CHEMICAL
WASTE DRAINAGE SYSTEM
SCOPE: THIS SPECIFICATION COVERS REQUIREMENTS FOR (CPVC) PLASTIC CHEMICAL WASTE
DRAINAGE SYSTEM PIPE AND FITTINGS AND INTENDED FOR SERVICE UP TO AND
INCLUDING 220 DEGREES FAHRENHEIT.
NSF INTERNATIONAL
NSF / ANSI TITLE
NSF 14 PLASTICS PIPING SYSTEM COMPONENTS AND RELATED MATERIALS
SCOPE: THIS STANDARD ESTABLISHES MINIMUM PHYSICAL, PERFORMANCE, HEALTH EFFECTS,
QUALITY ASSURANCE, MARKING AND RECORD-KEEPING REQUIREMENTS FOR PLASTIC
PIPING COMPONENTS AND RELATED MATERIALS. THE ESTABLISHED PHYSICAL,
PERFORMANCE AND HEALTH EFFECTS REQUIREMENTS APPLY TO MATERIALS (RESIN
OR BLENDED COMPOUNDS) AND INGREDIENTS USED TO MANUFACTURE PLASTIC PIPING
SYSTEM COMPONENTS.
UNDERWRITERS LABORATORIES
UL TITLE
UL 94 FLAMMABILITY TESTING
SCOPE: THIS TEST INDICATES THAT THE MATERIAL WAS TESTED IN A VERTICAL POSITION AND
SELF-EXTINGUISHED WITHIN A SPECIFIED TIME AFTER THE IGNITION SOURCE WAS
REMOVED.