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The 4" or 6" PVC Schedule 40 or CPVC Schedule 40 or 80 vent pipes can
be run from the water heater through the wall or from the wall to the
water heater, whichever is most convenient. The vent pipes must extend
a minimum of 1 1/2" (3.8 cm) through the exterior wall. Extending the vent
caps as far as possible from the surface of the exterior wall will help
minimize discoloration of the wall. Note that the inside flue mounting
adaptors must be slipped over the vent piping before locating the pipe
through the wall. Before securing the inside and outside collars to the
wall, use a silicone sealer between pipe and opening to insure a water
and air tight seal.
INSTALLATION SHOWING USE OF PVC OR CPVC PIPE FOR INLET
VENT PIPING:
Inlet piping through any type wall.
INSTALLATION SHOWING USE OF PVC OR CPVC PIPE FOR
OUTLET VENT PIPING:
Outlet vent piping showing 1" (2.5 cm) clearance through a wall of
combustible construction.
CONNECTING VENT TO BLOWER - 4" VENT PIPING
1. If making an immediate horizontal run of vent off the blower, the 6"
(15 cm) to 4" galvanized steel reducer and a PVC Schedule 40
street elbow are required for the inlet pipe, and the 6" to 4" reducer
and two CPVC Schedule 40 or 80 street elbows are required for
the outlet vent. Place the elbows in the required direction on the
reducers, and using 3 sheet metal screws each, attach the reducers
to the blower inlet and outlet collars and then attach the elbows to
the reducers.
2. If there is to be a vertical run of vent from the blower, the 6" to 4"
galvanized steel reducer must be attached to the venting hood collar
and then the PVC inlet pipe can be attached to the reducer using 3
sheet metal screws for each connection. A 6" to 4" reducer must be
attached to the blower outlet collar. Next, an outlet CPVC Schedule 40
or 80 street elbow is attached to the reducer using 3 sheet metal
screws for each connection. The CPVC Schedule 40 or 80 outlet
piping (for the first 10' or 3.05 cm) is then cemented to the street
elbow.