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Maximum and Minimum Vent Lengths for Residential
Maximum
Models
Altitude for
2" & 3" Vents
43VP40SE2,
43VP40SPE2,
5,999'
43VP50SE2,
43VP50SPE2
43VP40E2,
43VP40PE2,
7,700'
43VP50E2,
43VP50PE2
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 PVC
45° vent terminal must be used.
For your convenience screens for
both 2" and 3" vent terminals have
been included.
Minimum Vent Restrictor
Vent Restrictor
Mesh
Vent Pipe
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.
Venting information for 2" Vents*
Number of
Number
90° elbows
with Vent
One (1)
One (1)
Two (2)
Two (2)
Three (3)
* 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.
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.
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 pipe.
One 45° elbow is approximately equal to 2.5 feet of pipe.
Install the vent restrictor at the minimum vent lengths
listed above.
Vent Terminal
DO NOT use the vent restrictor for any other vent
lengths.
Maximum Vent
of
Pipe Length in
45°
Feet (ft)
Elbows
0' - 2,000'
44'
None
One (1)
41'
None
38'
One (1)
35'
None
32'
Number of
Maximum Vent Pipe
45° Elbows
Length in Feet (ft)
0' - 2,000'
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'
Maximum Vent Pipe
Length in Feet (ft)
2,001' and above.
See Maximum
Altitude chart on left
24'
21'
18'
15'
12'
Maximum Vent Pipe
Length in Feet (ft)
2,001' and above.
See Maximum
Altitude chart on left
75'
72.5'
70'
67.5'
65'
62.5'
60'
57.5'
55'
13
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