Lochinvar Armor AWH0400N Installation & Operation Manual page 19

3
General venting
Insulation shall not be used on PVC or
WARNING
⚠
CPVC venting materials.
insulation will cause increased vent wall
temperatures, which could result in vent
pipe failure.
Table 3G PVC/CPVC Vent Pipe, and Fittings
Approved PVC/CPVC Vent Pipe and Fittings
Item
PVC Schedule 40, 80 ANSI/ASTM D1785
Vent pipe PVC - DWV
CPVC Schedule 40, 80 ANSI/ASTM F441
PVC Schedule 40
PVC Schedule 80
Vent fittings CPVC Schedule 40
CPVC Schedule 80
PVC - DWV
Pipe Cement / PVC
Primer
CPVC
NOTICE: DO NOT USE CELLULAR (FOAM) CORE PIPE
NOTE: In Canada, CPVC and PVC vent pipe, fi ttings and cement/
primer must be ULC-S636 certifi ed.
1. Work from the water heater to vent or air termination.
Do not exceed the lengths given in this manual for the
air or vent piping.
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.
(continued)
The use of
Material Standard
ANSI/ASTM D2665
ANSI/ASTM D2466
ANSI/ASTM D2467
ANSI/ASTM F438
ANSI/ASTM F439
ANSI/ASTM D2665
ANSI/ASTM D2564
ANSI/ASTM F493
Installation & Operation Manual
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:
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.
Figure 3-7 Near Water Heater PVC/CPVC Venting -
Models 400 - 1000
VENT
*CPVC STREET ELBOW
MAY BE SUBSTITUTED
NOTE: WHEN USING A PVC/CPVC VENT SYSTEM, THE FIRST
CONNECTION TO THE APPLIANCE MUST BE MADE WITH CPVC.
If voids are present,
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