Use & Care Manual

14
Installing the Water Heater
Table 1
From Sea Level through 5,999 ft. (1,828 m) Above Sea Level
Model
Vent &
Combustion
Air-Inlet System
Diameter
Min. Allowed Equivalent
Vent & Combustion Air-
Inlet Lengths (Each Pipe
Run)
Max. Allowed Equivalent
Vent & Combustion Air-Inlet
Lengths (Each Pipe Run)
Vent and Combustion
Air-Inlet System
Termination(s)Inches Feet Meters Feet Meters
40 Gallon, 40,000
& 38,000 Btu/h
Models
2 7 2 30 9 90° Elbows Concentric*
3 7 2 60 18 90° Elbows
3 7 2 50 15 Concentric*
50 Gallon, 40,000
Btu/hr. Models
2 7 2 30 9 90° Elbows Concentric*
3 7 2 60 18 90° Elbows
3 7 2 50 15 Concentric*
*
Use only Rheem 3 in. (7.6 cm) concentric termination.
Figure 1
Vent
Combustion air-inlet
2 in.
(5.1 cm)
pipe
diameter
2 in.
(5.1cm)
pipe
diameter
Figure 2
3 in.
(7.6 cm)
pipe diameter
Vent
Combustion air-inlet
# Min. 2 1/2 in.
(6.4 cm) to 6
in. (15.2 cm)
Max. Spacing
# Min. 2 1/2 in.
(6.4 cm) to 6
in. (15.2 cm)
Max. Spacing
Elbow Examples
Standard Bend 90° Elbow
OK to Use
Long Bend 90° Elbow
OK to Use
Short Bend 90° Elbow
Do Not Use
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