Roof Termination Venting Chart
A
Minimum rise
B
Pipe length
C
Maximum run
D
Pipe length
Maximum
68 1/2”
1-24”
29"
1-12"
72 3/4”
1-12” 1-18"
75 1/4"
1-48" 1-12"
78 3/4”
1-24" 1-12”
11' 1 1/2"
2-48" 1-24"
84 3/4”
1-24" 1-18"
15' 10"
3-48" 1-24"
1-12"
92 1/2”
1-48”
20’ 10”
5-48"
For other rise/run combinations see chart below
NOTE: The vent must not exceed a total length of 68 feet.
Any combination of rise and run may be used but must be
constrained to the boundaries of this chart. A total of 4 - 90°
elbows or combination of other elbows equalling 90° can be
used without reducing horizontal run. For each additional 90°
elbow, or an equal combination of elbows, reduce horizontal
vent run by 2 feet. Ensure vent pipe is properly supported.
**
All dimensions are approximate. Both rise and run may vary with different
combinations of pipe.
24" Pipe
length
minimum
**
23
TC36.CODE_271119-40
100003879
