508134-01
Issue 2045
Page 29 of 56
Figure 22. Typical Exhaust Pipe Connections
TYPICAL
EXHAUST
PIPE CONNECTIONS
Pipe size determined in Table 11A and Table 11B.
2”
TOP VIEW
EXHAUST
INTAKE
2”
2”
2”
2”
or
TRANSITION
3”
*2”
**2”
1-1/2”
or
TRANSITION
EXHAUST
EXHAUST
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
.
EXHAUST
DO NOT transition
from smaller to larger
pipe in horizontal runs
of
exhaust pipe
.
EXHAUST
* When transitioning up in pipe size, use the shortest length of 2” PVC pipe possible.
** When transitioning down in pipe size, use at least 1 foot of 2" PVC pipe.
NOTE
: Exhaust pipe and intake pipe must be the same diameter.
Figure 23. Typical Intake Pipe Connections (Direct Vent Applications)
TYPICAL
INTAKE
PIPE CONNECTIONS
2”
Pipe size determined in Table 11A and Table 11B.
2”
2”
2”
2”
or
TOP VIEW
EXHAUST
INTAKE
TRANSITION
3”
*2”
*2”
TRANSITION
3”
*2”
**2”
1-1/2”
or
TRANSITION
* When transitioning up in pipe size, use the shortest length of 2” PVC pipe possible.
** When transitioning down in pipe size, use at least 1 foot of 2" PVC pipe.
NOTE
: Exhaust pipe and intake pipe must be the same diameter.
