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One Elbow
EXAMPLE VENT RUNS
A (Vertical) INITIAL PIPE
LENGTH
B (Horizontal)
6’
2’-7”
9’ MAXIMUM
EXAMPLE C
7’-6”
4’-1”
17’ MAXIMUM
8’
4’-7”
20’ MAXIMUM
EXAMPLE B
24’
20’-7”
10’ MAXIMUM
EXAMPLE A
32’
28’-7”
5’ MAXIMUM
Figure 33
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:
B
A
EXAMPLE VENT RUNS
A (Vertical)
INITIAL PIPE
LENGTH
B (Horizontal)
6’
2’-7”
9’ MAXIMUM
7’
3’-7”
14’-6” MAXIMUM
8’
4’-7”
20’ MAXIMUM
16’
12’-7”
15’ MAXIMUM
28’
24’-7”
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
A (VERTICAL)
INITIAL PIPE
LENGTH
B (Horizontal)
6’
2’-7”
6’ MAXIMUM
7’
3’-7”
11’-6” MAXIMUM
8’
4’-7”
17’ MAXIMUM
16’
12’-7”
12’ MAXIMUM
28’
24’-7”
4’-6” MAXIMUM
Figure 35
Three Elbows
EXAMPLE VENT RUNS
A (Vertical)
INITIAL PIPE
LENGTH
B (Horizontal)
6’-6”
3-1”
12’ MAXIMUM
7’6”
4’-1”
17’ MAXIMUM
8’
4’-7”
20’ MAXIMUM
16’
12’-7”
15’ MAXIMUM
32’
28’-7”
5’ MAXIMUM
Figure 36
TOP VENT - HORIZONTAL TERMINATION
