Instructions / Assembly

13
Maximum and Minimum Vent Lengths for Residential 40 & 50 Gallon
Power Vents
NOTICE: The mixing
of 2" and 3" vent pipe
is not recommended.
If 3" pipe is used, a 2"
to 3" reducer fitting is
recommended at the
rubber coupling.
This water heater is supplied
with a two-inch Schedule
40 PVC 45° vent terminal.
When venting with 3" pipe,
a Schedule 40 PVC 45°
vent terminal must be used.
Screens for both 2" and 3"
vent terminals have been
included.
Maximum Venting information for 2” Vents*
* For the 2” vent, one 90° elbow is approximately equal to 6 feet of vent
pipe. One 45° elbow is approximately equal to 3 feet of vent pipe.
Minimum vent length for 2”vent pipe is one (1) foot
of vertical pipe, one (1) 90°elbow, and two (2) feet of
horizontal pipe.
Number of 90° elbows
with Vent
Number of
45° Elbows
Maximum Vent Pipe
Length in Feet (ft)
One (1) None 95
One (1) One (1) 92.5
Two (2) None 90
Two (2) One (1) 87.5
Three (3) None 85
Three (3) One (1) 82.5
Four (4) None 80
Four (4) One (1) 77.5
Five (5) None 75
Maximum Venting information for 3” Vents**
** For the 3” vent, one 90° elbow is approximately equal to 5 feet of vent
pipe. One 45° elbow is approximately equal to 2.5 feet of vent pipe.
Minimum vent length for 3” vent pipe is one (1) foot
of vertical pipe, one (1) 90°elbow, and two (2) feet of
horizontal pipe.
Number
of 90°
elbows
with Vent
Number
of 45°
Elbows
Maximum Vent Pipe
Length in Feet (ft)
One (1) None 44
One (1) One (1) 41
Two (2) None 38
Two (2) One (1) 35
Three (3) None 32