Use & Care Manual

16
Installing the Water Heater
Table 2
From Sea Level through 2,000 ft. (609 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
50 Gallon, 65,000 &
47,000 Btu/hr. Models
3 7 2 50 15 90° Elbows
3 7 2 40 12 Concentric*
4 7 2 100 30 90° Elbows
65 Gallon, 65,000 &
56,000 Btu/hr. Models
3 8 2.5 50 15 90° Elbows
3 8 2.5 40 12 Concentric*
4 8 2.5 100 30 90° Elbows
75 Gallon, 75,100
&70,000 Btu/hr. Models
3 8 2.5 50 15 90° Elbows
3 8 2.5 40 12 Concentric*
4 8 2.5 100 30 90° Elbows
Figure 3
3 in.
(7.6 cm)
pipe diameter
Vent
Combustion air-inlet
3 in.
(7.6 cm)
pipe diameter
Figure 4
4 in.
(10.2 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
*Use only Rheem 3 in. (7.6 cm) concentric termination.
#
#