Installation / Operation Instruction Manual

11
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, &
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)
Minimum
Straight
Length
ft (m)
48, 65 gal.
25, 55, & 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 in (10.2 cm) vent pipe, use a 4 in (10.1 cm) to 3 in
(7.6 cm) reducer and exit the building wall with 3 in (7.6 cm) vent pipe
using the 3 in (7.6 cm) 90 vent terminal supplied. Two 45 elbows are
equivalent to one 90 elbow.