6: Required Parts For 3" Pvc/Cpvc Assembly Configuration; 7: Required Parts For 4" Pvc/Cpvc Assembly Configuration - Rinnai RU80i Manual

Adaptor Installation (continued)
Installation Examples for PVC/CPVC Twin Pipe Venting
Note the correct position of combustion air inlet and gas flue outlet, as these are NOT interchangeable. For the
correct position and design of the twin pipe gas flue outlet and combustion air inlet refer to the installation
instructions supplied with the appliance.
Figure 6: Required Parts For 3" PVC/CPVC Assembly Configuration
The adaptor as supplied requires no additional parts to be used with standard 3" 3rd party solid core PVC/CPVC
pipes; refer to Figure 6 below for required parts for 3" PVC/CPVC assembly configuration.
Figure 7: Required Parts For 4" PVC/CPVC Assembly Configuration
Conversely, the concentric to twin pipe adaptor require 2 additional (4"x 3" Flush – Schedule 40 PVC) bushing
to be used with 4" PVC/CPVC assembly configuration (refer to Figure 7 below).
Failure to correctly assemble the components according to these instructions may result in property damage,
serious injury, or death.
WARNING
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