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VENT PIPE PREPARATION AND JOINING
Most failures in PVC, CPVC or ABS systems result from improper preparation and
joining of pipe and fittings. The guidelines below must be followed when
installing the venting system. If you have any question about the application
or installation of the PVC, CPVC or ABS venting system, contact the manufacturer,
supplier, or your plumbing professional.
1)
Specific cleaners, solvents, primers and cements are available for PVC,
CPVC and ABS pipe. Be sure these materials match the type of pipe to be
installed. Never use all-purpose cements, commercial glues and adhesives
or ABS cement to join PVC or CPVC pipe and fittings.
a)
CLEANERS, SOLVENTS, PRIMERS AND CEMENTS ARE
FLAMMABLE. Do not store or use these materials near
heat or open flame, or in the vicinity of other appliances.
2)
Use proper cutting, deburring and applicator tools to ensure proper
preparation and joining of pipe and fittings.
a)
Cutting Tools
i)
A square cut must be achieved with a miter box saw or pipe
cutter to ensure a proper mating with the female. If a pipe
cutter is used, the burr created at the outer edge of the pipe
must be removed.
b)
Deburring Tools
i)
A file, knife or plastic deburring tool can be used to remove
burrs. Burrs must be removed from the inside and outside
edges of the pipe to ensure a proper seal.
c)
Applicator Tools
i)
A pure bristle paintbrush or roller may be used to apply
cement. Prompt application of the cement is important due
its fast drying properties.
3)
Inspection, Cleaning, Priming and Cementing
a)
Inspect the pipe inside and out for dirt, dust, moisture or grease
etc. Check pipe and fittings for splits or cracks and replace if
necessary.
b)
Clean pipe and fittings are imperative for proper joining. Following
cutting and deburring, wipe away any foreign material with a clean
dry rag. If wiping fails to thoroughly clean surfaces, chemical
cleaning is necessary.
c)
Primer must be applied to the pipe surface and fitting socket with
a natural bristle brush. This serves to soften and prepare the PVC or
CPVC for cementing.
d)
Cementing must be done quickly to avoid over-drying before joining.
i)
Apply one coat to the outside end of the pipe at a width
slightly greater than the depth of the socket.
ii)
Apply a coat around the inside of the fitting socket.
iii) Apply a second coat around the end of the pipe.
4)
Joining
a)
Joints should be made immediately after cement is applied.
b)
After fully inserting pipe into fitting socket, give pipe about ¼ turn
to help spread cement evenly. Hold joint together for about 15 to
20 seconds.
c)
Remove excess cement from around pipe and fitting with a clean
rag.
d)
Cement drying times may vary. Be sure to allow for the
recommended drying time before disturbing joints.
For more specific and detailed information about the above, contact the
manufacturer, supplier, or competent professional.
15
RPV-I&S
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