Rheem GHE80SU Use & Care Manual page 29

Installation
The PVC to PP adapter should then be installed into the PVC couplings on the inlet air and exhaust vent installed on the
unit. The sealing gasket will require some type of lubricant to make it easier to install the adapter.
Both Centrotherm and M&G Duravent recommend a connector ring to be installed between the PVC part and the PP
part. The connector ring for the Centrotherm pipe (either IAFC02, IAFC03, or IAFC04) is shown below. The connector ring
for the M&G Duravent pipe is shipped with the PVC to PP adapter..
Pipe and fittings are then installed to reach the area for the vent terminations. Each bell end of the pipe has a gasket,
which should be lubricated before the next piece of pipe or fitting is installed.
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