33740-17-0120
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top Vent - Vertical terMination
no elbows
DiMensions
MiniMUM
MaXiMUM
10’
40’
Figure 37
two elbows
eXaMple Vent rUns
initial pipe
lenGtH
a (Vertical)
B (Horizontal)
4’-1”
7’-6”
17’ MAXIMUM
4’-7”
8’
20’ MAXIMUM”
12’-7”
16’
15’ MAXIMUM
24’-7”
28’
7’-6” MAXIMUM
28’-7”
32’
5’ MAXIMUM
Figure 38
three 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
lenGtH
a (Vertical)
B (Horizontal)
3’-7”
7’
11’-6” MAXIMUM
4’-7”
8’
17’ MAXIMUM
8’-7”
12’
14’-6” MAXIMUM
12’-7”
16’
12’ MAXIMUM
24’-7”
28’
4’-6” MAXIMUM
Figure 39