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top Vent - HoriZontal terMination
one elbow
initial
pipe
lenGtH
24"
36"
eXaMple c
4'-1"
eXaMple B
20'-7"
eXaMple a
28'-7"
note: Pipe straps must be used every 2 feet to secure venting.
two 45° elbows
Installation requirements to replace the first 90° elbow with two
45° elbows:
A
eXaMple Vent rUns
initial pipe
a (Vertical)
lenGtH
24"
36"
4'-7"
12'-7"
24'-7"
33740-17-0120
eXaMple Vent rUns
a (Vertical)
B (Horizontal)
5'-10"
7'-3" MAXIMUM
6'-10"
13' MAXIMUM
7'-6"
17' MAXIMUM
24'
10' MAXIMUM
32'
5' MAXIMUM
Figure 33
B
B (Horizontal)
5'-10"
7'-3" MAXIMUM
6'10"
13' MAXIMUM
8'
20' MAXIMUM
16'
15' MAXIMUM
28'
7'-6" MAXIMUM
Figure 34
two elbows
note: Subtract 3 feet from the total horizontal measurement for
each 90° elbow installed horizontally. Subtract 1-1/2 feet from the
total horizontal measurement for each 45° elbow installed hori-
zontally.
eXaMple Vent rUns
initial pipe
a (Vertical)
lenGtH
36"
48"
4'-7"
12'-7"
24'-7"
three elbows
eXaMple Vent rUns
initial pipe
a (Vertical)
lenGtH
1' MINIMUM
1' MINIMUM
1' MINIMUM
1' MINIMUM
1' MINIMUM
B (Horizontal)
6'-10"
10' MAXIMUM
7'-10"
15'-10" MAXIMUM
8'
17' MAXIMUM
16'
12' MAXIMUM
28'
4'-6" MAXIMUM
Figure 35
B (Horizontal)
6'-6"
12' MAXIMUM
7'-6"
17' MAXIMUM
8'
20' MAXIMUM
16'
15' MAXIMUM
32'
5' MAXIMUM
Figure 36
Page 23
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