507769-05G / 31-5000656
Page 20 of 55
Issue 2223
Figure 22. Typical Exhaust Pipe Connections
Pipe size determined in table 7.
2”
TOP VIEW
EXHAUST
INTAKE
2”
2”
2”
2”
or
TRANSITION
3”
*2”
*2”
1-1/2”
or
TRANSITION
NOTE
: 1-1/2” Vent Pipe
Diameter Allowed Only
on 045/070 Units
DO NOT transition
from larger to smaller
pipe in horizontal runs
of
exhaust pipe
.
DO NOT transition
from smaller to larger
pipe in horizontal runs
of
exhaust pipe
.
* When transitioning up in pipe size, use the shortest length of 2” PVC pipe possible.
NOTE
: Exhaust pipe and intake pipe must be the same diameter.
Figure 23. Typical Intake Pipe Connections (Direct Vent Applications)
2”
Pipe size determined in table 7.
2”
2”
2”
2”
or
TOP VIEW
EXHAUST
INTAKE
TRANSITION
3”
*2”
*2”
TRANSITION
3”
*2”
*2”
1-1/2”
or
TRANSITION
NOTE
: 1-1/2” Vent Pipe
Diameter Allowed Only
on 045/070 Units
* When transitioning up in pipe size, use the shortest length of 2” PVC pipe possible.
NOTE
: Exhaust pipe and intake pipe must be the same diameter.
