Rinnai RU80i - Installation of PVC;CPVC Vent and Intake Air Piping

KB Series Manual 25
Installaon of PVC/CPVC Vent and Intake Air Piping:

Note the correct posion of combuson air inlet and gas ue outlet, as these are  interchangeable. For the
correct posion and design of the twin pipe gas ue outlet and combuson air inlet refer to the installaon
instrucons supplied with the appliance.

The adaptor as supplied requires no addional parts to be used with standard 3” 3rd party solid core PVC/
CPVC pipes; refer to gure below for required parts for 3” PVC/CPVC assembly conguraon.

Conversely, the concentric to twin pipe adaptor require 2 addional (4”x 3” Flush – Schedule 40 PVC) bushing
to be used with 4” PVC/CPVC assembly conguraon (refer to gure below).

Failure to correctly assemble the components according to these instrucons may result in property damage,
serious injury, or death.