Rinnai RU98i Installation Manual page 18

Options for Combustion Air Vent:
•
For extended Intake pipe runs, PVC can be used between the Intake Header and Termination.
•
Use the PVC adapter (described below) when transitioning from the PP intake header to the stainless steel
Combustion Air Termination.
WARNING
Item Description
Plastic Vent and/or
combustion air
Plastic pipe cement
•
Combustion Air PVC Adapter Kit (Part #: 780037) includes both a transition from the 8" (200mm) PP header
to 8" PVC and an 8"PVC to 8" (200mm) termination
PP to PVC ADAPTER:
8" (200mm) PP header to 8" PVC
•
Fasten, secure, and support all vent materials using manufacturer and industry standards to avoid potential
intake air leaks or blockage. Support horizontal vent runs a minimum of every 4 feet and all vertical vent
runs a minimum of every 6 feet.
The materials described below can only be used on the combustion air vent. The Ubbink
Polypropylene CVent can be used on both the combustion air and exhaust. Field supplied
PVC material can only be used on the combustion air side and MUST NOT be used for
the exhaust.
PVC Schedule 40
PVC - DWV
components
CPVC Schedule 40
PVC
and primer
CPVC
Approval Codes for In-
stallation
Flue Material
ANSI/ASTM D1785
ANSI/ASTM D2665
ANSI/ASTM F441
ANSI/ASTM D2564
ANSI/ASTM F493
PVC to TERMINATION ADAPTER:
8"PVC to 8" (200mm) termination
FIELD
SUPPLIED
PVC PIPE
Plastic pipe
cement and
primer
18
United States
Rinnai CVent