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"Installation Handbook: CPVC Hot & Cold Water Piping" click
Chlorinated Poly (Vinyl Chloride) (CPVC)
is a thermoplastic pipe and fitting material made with CPVC compounds
meeting the requirements of ASTM Class 23447 as defined in ASTM Specification
D1784.CPVC applicationsare for
potable water distribution, corrosive fluid handling in industry, and
fire suppression systems.
CPVC piping systems are:
- Environmentally friendly.
- Provide long service life.
- Easy to install and handle.
- Corrosion resistant.
- Cost effective.
- Widely accepted by codes.
Industrial CPVC pipe is manufactured by extrusion in sizes
from ¼" to 12" diameter to Sch 40, Sch 80, and SDR (Standard Dimension
CPVC pipe for plumbing systems is manufactured
by extrusion in sizes ¼" through 2" copper tube size (CTS) dimensions.
The CTS plumbing products are made to copper tube outside diameter dimensions,
in accordance with ASTM D-2846 specifications, and have an SDR 11 wall
thickness. The pressure ratings of the CTS SDR 11 systems are 400 psi
(pounds per square inch) at 73 F and 100 psi at 180 F. CPVC plumbing
pipe is sold in both straight lengths and (in small diameters) coils.
CPVC piping which is suitable for hot and cold water distribution
has a 400 psi pressure rating at room temperature, and a 100 psi
pressure rating at 180 F.
CPVC materials are resistant to many
everyday household chemicals.
Since CPVC materials do not support
combustion, they cannot burn without an external fuel source. This
property makes CPVC pipe an attractive alternative to steel and copper
pipe for fire sprinkler applications. CPVC fire sprinkler piping systems
are approved for light hazard applications and for use in single and
multifamily dwellings. Installation shall be in accordance with the
NFPA Section 13, 13D, and 13R.
CPVC piping for potable hot and cold water distribution systems is recognized
in all model plumbing codes.
Also, CPVC plumbing pipe is safe for
installation in return air plenums; however, the installation must
be approved by the local jurisdiction. Even though CPVC is considered
a combustible material it will not burn without a significant external
flame source. Once the flame source is removed CPVC will not sustain
combustion. Testing indicates that water filled CPVC in diameters 3"
or less will pass the 25/50 flame smoke developed requirements for non-metallic
material in return air plenums.
CPVC fire sprinkler pipe tested and listed
in accordance with UL 1887, "Fire Test of Plastic Sprinkler Pipe for
Flame and Smoke Characteristics," meets the requirements of NFPA 90A
for installation in return air plenums.
CPVC pipe and fittings are produced by many manufacturers, and are available
in Schedule 40 and Schedule 80 dimensions, as well as CPVC tubing which
is suitable for potable hot and cold water distribution. The tubing
is based on copper tube sizes (OD) and IPS pipe (OD), with SDR 11 wall
CPVC pipe must be labeled at not more than 1.5 meters (5 feet) intervals
DO'S & DON'T'S FOR INSTALLING
- The manufacturer's name or trademark
- The standard to which it conforms
- Pipe size
- Resin type or cell class according
to ASTM D-1784, e.g. CPVC 23447
- Pressure rating
- SDR number or Schedule number
- If the pipe is for potable water, a
laboratory seal or mark attesting to suitability for potable water
DO's FOR ALL CONSTRUCTION
- Read the manufacturer's installation
- Make sure all thread sealants, gasket
lubricants, and fire stop materials are compatible with CPVC.
- Keep pipe and fittings in original
packaging until needed.
- Use tools specifically designed for
use with plastic pipe and fittings.
- Cut the pipe ends square.
- Deburr and bevel the pipe ends with
a chamfering tool.
- Use the proper solvent cement and follow
- Rotate the pipe at least ¼ turn when
bottoming the pipe into the fitting socket.
- Avoid puddling of cement in fittings
- Follow the cement manufacturer's recommended
cure times prior to pressure testing.
- Allow CPVC tube slight movement to
permit thermal expansion.
- Use plastic pipe straps that fully
encircle the tube.
- Drill holes ¼" larger than the outside
diameter of the tube, when penetrating wood studs.
- Use protective pipe isolators when
penetrating steel studs.
- Use metallic clevis or tear drop hangers
when suspending tube from all-thread rod.
DO's FOR UNDERSLAB CONSTRUCTION
- Use compatible sleeving material and
- Securely tape the top of the sleeve
to the pipe.
- Extend pipe sleeve 12" above and below
- Backfill and cover underground piping
prior to spraying termiticide in preparation for concrete pour.
FOR ALL CONSTRUCTION
- Do not use petroleum or solvent based
sealants, lubricants, or fire stop materials.
- Do not use edible oils, such as Crisco,
for a lubricant.
- Do not use solvent cement that has
exceeded its shelf life or has become discolored or jelled.
- Do not pressure test until the recommended
joint cure times are met.
- Do not thread, groove, or drill CPVC
- Do not overtighten or lock down the
- Do not install in cold weather without
allowing for thermal expansion.
- Do not use tube straps which tend to
- Do not use wood or plastic wedges that
strain the tube as it passes through wood studs.
- Do not use pipe isolators as tube passes
through wood studs
- Do not bend CPVC tube around DWV stacks
causing the two materials to bind against each other.
- Do not terminate a run of tube against
an immovable object (e.g., a floor joist).
's FOR UNDERSLAB CONSTRUCTION
- Do not allow heavy concentrations of
termiticides to come into direct and sustained contact with CPVC pipe.
- Do not inject termiticides into the
annular space between the pipe wall and sleeving material.
- Do not spray termiticide, when preparing
a slab, without first backfilling over underground piping.
- Do not cut sleeving too short. Sleeving
material should extend 12" above and below the slab.