Figure 22 Allowed SST installation orientations
The SST vent/air connections fit Sched. 40 three inch PVC/CPVC pipe. PP pipe cannot be
used with the SST. The pipes must extend completely through the wall as shown below,
and immediately inside the wall, adapt up to a 4 inch pipe using a standard reducing
coupling fitting. Do not use a bushing. The SST is an external fixture, and is not part of the
sealed vent system that runs inside the building.
Figure 23 Pipes extend completely through the wall (Vertical orientation shown)
Ensure that the vent termination location does not exceed the allowed maximum
equivalent vent length, including the allowance for the SST.
Install multiple vent SST installations level with one another and maintain at least the
minimum separation distances shown below. The terminals shall not be stacked vertically.
Figure 24 : Minimum separation for multiple
vent installation - vertical orientation
Figure 25 : Minimum separations for multiple vent
installation - horizontal orientation
Approved PVC Side Wall Termination kits are listed below:
Ipex # 196985 3" (SL 26-260 G3)
Ipex # 196986 4" (SL 40-399 G3)
Figure 26 Approved PVC Side Wall Termination configuration
3.7.6 Sidewall vent termination
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