American Water Heater PowerVent Use & Care Manual page 13

Maximum and Minimum Vent Lengths for Residential
40 & 50 Gallon Power Vents
Maximum
Models Altitude for
2" & 3" Vents
42VP40SF-E,
42VP40SPF-E,
5,999'
42VP50SF-E,
42VP50SPF-E
42VP40F-E,
42VP40PF-E,
7,700'
42VP50F-E,
42VP50PF-E
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.
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.
Maximum Venting information for 2" Vents*
Number of Number Maximum Vent Pipe
90° elbows of 45° Length in Feet (ft)
with Vent Elbows
One (1) None
One (1) One (1)
Two (2) None
Two (2) One (1)
Three (3) None
* 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 3" vent pipe is one (1) foot of vertical pipe, one (1)
90°elbow, and four (4) feet of horizontal pipe.
Maximum Venting information for 3" Vents**
Number of 90° elbows
with Vent
0-Maximum Altitude:
One (1)
One (1)
Two (2)
Two (2)
Three (3)
Three (3)
Four (4)
Four (4)
Five (5)
** 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.
Maximum Vent Pipe
Length in Feet (ft)
2,001' and above.
0' - 2,000'
See Maximum Altitude
chart on left.
44 34
41 31
38 28
35 25
32 22
Number of Maximum Vent Pipe
45° Elbows Length in Feet (ft)
See chart on upper left.
None 95
One (1) 92.5
None 90
One (1) 87.5
None 85
One (1) 82.5
None 80
One (1) 77.5
None 75
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