Install Instructions

Installation & Operation Manual
18
3 General venting
1. Work from the water heater to vent or air termination.
Do not exceed 100 feet in length.
2. Cut pipe to the required lengths and deburr the inside
and outside of the pipe ends.
3. Chamfer outside of each pipe end to ensure even
cement distribution when joining.
4. Clean all pipe ends and fittings using a clean dry rag.
(Moisture will retard curing and dirt or grease will prevent
adhesion.)
5. Dry fit vent or air piping to ensure proper fit up before
assembling any joint. The pipe should go a third to
two-thirds into the fitting to ensure proper sealing after
cement is applied.
6. Priming and Cementing:
a. Handle fittings and pipes carefully to prevent
contamination of surfaces.
b. Apply a liberal even coat of primer to the fitting
socket and to the pipe end to approximately 1/2"
beyond the socket depth.
c. Apply a second primer coat to the fitting socket.
d. While primer is still wet, apply an even coat of
approved cement to the pipe equal to the depth of
the fitting socket along with an even coat of
approved cement to the fitting socket.
e. Apply a second coat of cement to the pipe.
f. While the cement is still wet, insert the pipe into
the fitting, if possible twist the pipe a 1/4 turn as
you insert it. NOTE: If voids are present,
sufficient cement was not applied and joint could
be defective.
g. Wipe excess cement from the joint removing ring or
beads as it will needlessly soften the pipe.
Table 3B PVC/CPVC Vent Pipe and Fittings
Approved PVC/CPVC Vent Pipe and Fittings
Item Material Standard
Vent pipe
PVC Schedule 40, 80 ANSI/ASTM D1785
PVC - DWV ANSI/ASTM D2665
CPVC Schedule 40, 80 ANSI/ASTM F441
Vent fittings
PVC Schedule 40 ANSI/ASTM D2466
PVC Schedule 80 ANSI/ASTM D2467
CPVC Schedule 80 ANSI/ASTM F439
PVC - DWV ANSI/ASTM D2665
Pipe Cement /
Primer
PVC ANSI/ASTM D2564
CPVC ANSI/ASTM F493
NOTICE: DO NOT USE CELLULAR (FOAM) CORE PIPE
NOTE: In Canada, CPVC and PVC vent pipe,  ttings and cement/
primer must be ULC-S636 certi ed.
⚠WARNING
Insulation shall not be used on PVC or CPVC
venting materials. The use of insulation will
Figure 3-7 Near Water Heater PVC/CPVC Venting
CPVC STARTER PIECE
Installing vent and air piping
Use only cleaners, primers, and solvents that
are approved for the materials which are
joined together.
NOTICE
PVC/CPVC
⚠WARNING
The vent connection to the appliance must
be made with the starter CPVC pipe section
This product has been approved for use with the PVC/CPVC
vent materials listed in Table 3B.
All CPVC and PVC vent pipes must be
glued, properly supported, and the exhaust
NOTICE
must be pitched a minimum of 1/4" per foot back to the water
heater (to allow drainage of condensate). Horizontal runs
shall have supports suitable for non-metallic vent piping that
do not clamp tightly onto vent allowing for vent expansions or
contraction. Supports shall be as close to joints and fittings as
practical and no more than 5 ft. apart.
provided with the appliance if PVC/CPVC vent is to be used.
The field provided vent fittings must be cemented to the CPVC
pipe section using an “All Purpose Cement” suitable for PVC
and CPVC pipe. Use only the vent materials, primer, and
cement specified in Table 3B to make the vent connections.
Failure to follow this warning could result in fire, personal
injury, or death.
cause increased vent wall temperatures, which could result in
vent pipe failure.
NOTICE
When available, follow all vent manufacturer's
installation instructions.