13
Venting
Co-Axial
Not to scale
V1
V2
V3
H1
H2
1” min.
all around
vertical pipe
3” min.
above top of
horizontal pipe
1” min. around
bottom & sides of
horizontal pipe
Max. 24”
before
elbow
Roof
termination
Sidewall
termination
Sidewall
termination
Min. 24”
before
elbow
Use 658TG or
845TG vent
guard with a
vent terminal
located at less
than 7’ (2.13 m)
above grade
5 x 90º ELBOWS MAXIMUM
(or equivalent)
Venting Diagram
Example 1
Value V = V1 (6’) + V2 (3’) + V3 (2‘) = 11’
Value H = H1 (2’) + H2 (2’) = 4’
Restrictor 75