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Installing the New Water Heater (cont’d)
VENTING THROUGH A ROOF
ALL MODELS
3″ PVC, ABS or CPVC Schedule 40 vent piping:
1. A 3″ PVC Schedule 40-45° vent cap with wire screen is
supplied with the water heater.
2. 3″ PVC, ABS, or CPVC Schedule 40 piping and fittings
are acceptable materials for the vent system on all mod-
els and must be supplied locally.
75 GALLON 70,000 and 75,000 BTU/HR, 50 GALLON
52,500, 55,000 and 62,500 BTU/HR, 40 GALLON 50,000
BTU/HR MODELS ONLY — OPTIONAL 4″ VENT PIPING
4″ PVC, ABS or CPVC Schedule 40 vent piping:
1. A wire screen to fit a 4″ PVC, ABS or CPVC Schedule
40-45° vent cap is supplied with the water heater.
2. A 3″ PVC, ABS or CPVC Schedule 40 pipe, minimum
length of 3″ (must be supplied locally), to make vent
connection at the blower outlet.
3. A 4″ to 3″ PVC, ABS or CPVC Schedule 40 reducer
(must be supplied locally).
4. 4″ and 3″ PVC, ABS, or CPVC Schedule 40 piping and
fittings are acceptable materials for the vent system on
all 75 gallon 70,000 and 75,000 BTU/HR , 50 gallon
52,500, 55,000 and 62,500 BTU/HR, 40 gallon 50,000
BTU/HR models and must be supplied locally.
2″ PVC, ABS OR CPVC
SCHEDULE 40 PIPE
3″ PVC, ABS OR CPVC
SCHEDULE 40 PIPE
(MINIMUM LENGTH 3″)
3″ TO 2″ PVC, ABS OR
CPVC REDUCER
4. If the optional 4″ vent piping is to be used (50,000
BTU/Hr. and higher models only), the 4″ street elbow, 4″
to 3″ reducer and 3″ (minimum) section of 3″ PVC, ABS
or CPVC pipe must be supplied locally. The 3″ (mini-
mum) section of 3″ PVC, ABS or CPVC pipe must be
attached to the blower using 3 sheet metal screws.
ALL 40 AND 50 GALLON 40,000 BTU/HR MODELS —
OPTIONAL 2″ VENT PIPING
2″ PVC, ABS or CPVC Schedule 40 vent piping:
1. A wire screen to fit a 2″ PVC, ABS or CPVC Schedule
40-45° vent cap is supplied with the water heater.
2. A 3″ PVC, ABS or CPVC Schedule 40 pipe, minimum
length of 3″ (must be supplied locally), to make vent
connection at the blower outlet.
3. A 3″ to 2″ PVC, ABS or CPVC Schedule 40 reducer
(must be supplied locally).
4. 2″ and 3″ PVC, ABS, or CPVC Schedule 40 piping and
fittings are acceptable materials for the vent system on
all 40 and 50 gallon 40,000 BTU/HR models and must
be supplied locally.
1. The water heater requires its own (separate) venting
system.
2. It cannot be connected to existing vent piping or
chimney.
3. It must terminate vertically to the outdoors.
4. Typical installation(s) shown on page 22.
5. Refer to “Cementing PVC, ABS or CPVC Pipe and
Fittings” on page 19 and “Connecting Vent to Blower”
on pages 20 and 21.
4″ PVC, ABS OR CPVC
SCHEDULE 40 PIPE
3″ PVC, ABS OR CPVC
SCHEDULE 40 PIPE
(MINIMUM LENGTH 3″)
4″ TO 3″ PVC, ABS OR
CPVC REDUCER