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
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
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.
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