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Maximum and Minimum Vent Lengths
NOTICE: The mixing of 2" and 3"
vent pipe is not recommended. If
3" pipe is used, a 2" to 3" bell
coupling is recommended at the
rubber coupling.
This water heater is supplied with
a two-inch Schedule 40 PVC 45°
vent terminal. If you decide to vent
with 3" pipe, a Schedule 40 DWV
PVC 45° vent terminal must be
used. For your convenience
screens for both 2" and 3" vent
terminals have been included.
Number of 90° elbows
with Vent
Number of
45° Elbows
Maximum Pipe Length
in Feet (ft)
One (1) None 44.00
One (1) One (1) 41.00
Two (2) None 38.00
Two (2) One (1) 25.00
Three (3) None 32.00
Number of 90° elbows
with Vent
Number of
45° Elbows
Maximum Pipe Length
in Feet (ft)
One (1) None 95.00
One (1) One (1) 92.50
Two (2) None 90.00
Two (2) One (1) 87.50
Three (3) None 85.00
Three (3) One (1) 82.50
Four (4) None 80.00
Four (4) One (1) 77.50
Five (5) None 75.00
Venting information for 2” Vents*
Venting information for 3” Vents**
* For the 2” vent, one 90° elbow is approximately equal to 6 feet of pipe. One
45° elbow is approximately equal to 3 feet of pipe.
** For the 3” vent, one 90° elbow is approximately equal to 5 feet of pipe.
One 45° elbow is approximately equal to 2.5 feet of pipe.
Safety Instructions Installation Instructions Operating Instructions Care and Cleaning Troubleshooting Tips Customer Service
Minimum vent length for 2” vent pipe is one (1) foot of vertical pipe, one (1)
90°elbow, and three (3) feet of horizontal pipe.
Minimum vent length for 3” vent pipe is one (1) foot of vertical pipe, one (1)
90°elbow, and four (4) feet of horizontal pipe.