25
• 4” and 3” PVC, ABS or CPVC Schedule 40 piping and fittings
are acceptable materials for vent system on all 75 gallon
70,000 and 75,000 BTU/HR models and must be supplied
locally.
FIGURE 46.
ALL 40 AND 50 GALLON 40,000 BTU/HR MODELS -
OPTIONAL 2” VENT PIPING
2” PVC, ABS or CPVC Schedule 40 vent piping:
• A wire screen to fit 2” PVC, ABS or CPVC Schedule 40 - 45
o
vent cap is supplied with the water heater.
• 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.
• A 3” to 2” PVC, ABS or CPVC Schedule 40 reducer (must be
supplied locally).
• 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.
FIGURE 47.
• The water heater requires its own (separate) venting
system.
• It cannot be connected to existing vent piping or chimney.
• It must terminate vertically to the outdoors.
• Typical installation(s) in next column.
• Refer to “Cementing PVC, ABS or CPVC pipe and fittings”
on page 23 and “Connecting Vent to Blower” on page 24.
FIGURE 48.
• The total vertical and horizontal vent runs cannot exceed the
maximum length with the number of 90
o
elbows as specified
in the tables to follow. If more elbows are required, the venting
distance must be reduced 5 feet for every 90
o
elbow.
75 GALLON 70,000 AND 75,000 BTU/HR MODELS ONLY
3” DIA. VENT NUMBER OF
MAX. LENGTH (FT.) 90
o
ELBOWS*
70 1
65 2
60 3
55 4
50 5
45 6
75 GALLON 70,000 AND 75,000 BTU/HR MODELS ONLY -
OPTIONAL 4” VENT PIPING
4” DIA. VENT NUMBER OF
MAX. LENGTH (FT.) 90
o
ELBOWS*
110 1
105 2
100 3
95 4
90 5
85 6
ALL 40 AND 50 GALLON 40,000 BTH/HR MODELS ONLY
3” DIA. VENT NUMBER OF
MAX. LENGTH (FT.) 90
o
ELBOWS*
115 1
110 2
105 3
100 4
95 5
90 6
