Installation / Operation Instruction Manual
13
Venting continued-
TABLE 1 - VENT CONNECTOR LENGTHS
FOR 3 inch
(7.6 cm)
DIAMETER VENT PIPE
Terminating # of
Elbows
(excl.
vent
term)
Maximum straight
Length ft (m)
Minimum
straight
Length ft (m)
48, 65 gal. 25, 55 and
75 gal.
Through the Wall
1 55 (16.8) 45 (13.7)
2
(.6)
Through the Wall
2 50 (15.2) 40 (12.2)
2
(.6)
Through the Wall
3 45 (13.7) 35 (10.7)
2
(.6)
Through the Wall
4 40 (12.2) 30 (9.1)
2
(.6)
Through the Roof
0 60 (18.3) 50 (15.2)
7
(2.1)
Through the Roof
1 55 (16.8) 45 (13.7)
7
(2.1)
Through the Roof
2 50 (15.2) 40 (12.2)
7
(2.1)
Through the Roof
3 45 (13.7) 35 (10.7)
7
(2.1)
TABLE 2 -VENT CONNECTOR LENGTHS
FOR 4 inch
(10.2 cm)
DIAMETER VENT PIPE
Terminating
# of 90
Elbows (excl.
vent term.)
Maximum straight
Length ft (m)
Min
straight
Length
ft (m)
48, 65 gal. 25, 55 and
75 gal.
Through the Wall
1 175 (53.3) 175 (53.3)
10
(3.1)
Through the Wall
2 170 (51.8) 170 (51.8)
10
(3.1)
Through the Wall
3 165 (50.3) 165 (50.3)
10
(3.1)
Through the Wall
4 160 (48.8) 160 (48.8)
10
(3.1)
Through the Wall
5 155 (47.2) 155 (47.2)
10
(3.1)
Through the
Roof
0 180 (54.9) 180 (54.9)
15
(4.6)
Through the
Roof
1 175 (53.3) 175 (53.3)
15
(4.6)
Through the
Roof
2 170 (51.8) 170 (51.8)
15
(4.6)
Through the
Roof
3 165 (50.3) 165 (50.3)
15
(4.6)
Through the
Roof
4 160 (48.8) 160 (48.8)
15
(4.6)
NOTE: When using 4 inch (10.2 cm) vent pipe, use a 4 inch (10.1 cm) to 3
inch (7.6 cm) reducer and exit the building wall with 3 inch (7.6 cm) vent