Venting Through Roof - A.O. Smith PREFERRED BPD 400 Installation, Operation, Service, Maintenance, Limited Warranty

CONNECTING VENT TO BLOWER - 6" VENT PIPING
1. If making an immediate horizontal run of vent off the blower, a 7 1/
4" (18.4cm) min. long PVC Schedule 40 pipe section and an elbow
are required for the inlet pipe. A 4" min. long CPVC Schedule 40 pipe
section (supplied), one CPVC Schedule 40 or 80 regular elbow and
one CPVC Schedule 40 or 80 street elbow are required for the
outlet vent.
2. If there is to be a vertical run of vent from the blower, the PVC Schedule
40 inlet pipe must be attached to the venting hood collar. A 4" min. long
CPVC Schedule 40 pipe section (supplied) must be attached to the
blower outlet collar using three sheet metal screws. A CPVC Schedule
40 or 80 elbow is then cemented on to the end of the 4" pipe section.
CPVC Schedule 40 or 80 pipe (for the first ten feet) is then cemented to
the upturned elbow.
VENTING THROUGH A ROOF
Items supplied in the carton:
1. One 4" inlet PVC Schedule 40 - 45° vent cap with screen.
2. One 4" outlet CPVC Schedule 80 - 45° vent cap with screen.
3. Two 6" to 4" galvanized steel reducers.
4. Two wire screens to fit one each 6" PVC or CPVC 45° vent caps (the 6"
PVC or CPVC vent caps must be supplied locally).
5. One 4" long CPVC Schedule 40 6" diameter pipe section.
6. Four 4" and four 6" wall collars.
All other PVC Schedule 40 or CPVC Schedule 40 or 80 piping and fittings
must be supplied locally.
1. The water heater requires its own (separate) venting system.
2. Only 4" or 6" CPVC Schedule 40 or 80 piping and fittings are acceptable
materials for the first ten feet of the outlet vent system.
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