Installation / Operation Instruction Manual

35
Vent Pipe Preparation
WARNING
DO NOT attempt to start this water heater until vent pipe solvent fumes completely clear from the
room and inside the vent piping.
Vent Pipe Preparation and Joining
Most failures in vent 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 venting
system, contact the vent pipe 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. The vent pipe manufacturers joining instructions must be followed in
all cases. Never use all-purpose cements, commercial glues and adhesives or ABS cement to join PVC or CPVC pipe
and fittings. Refer to the table at the beginning of the “Venting” section for approved primers and cements.
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 natural 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 found.
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 pipe 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, 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 vent pipe manufacturer, supplier, or competent
professional.
SAFETY PRECAUTION: PRIMERS AND CEMENTS ARE EXTREMELY FLAMMABLE AND MUST NOT BE STORED
OR USED NEAR HEAT OR OPEN FLAME. ALSO, USE ONLY IN A WELL VENTILATED AREA.