Installation Sheet
30 Rinnai Tankless Water Heater Installaon and Operaon Manual
Twin Pipe Installaon Instrucons
DO NOT apply PVC glues, solvents, or cleaners to the water heater’s combuson air or exhaust
gasket connecons. Failure to correctly assemble the components according to these instrucons
may result in property damage, personal injury, or death.
WARNING
The water heater is equipped with a 2 in. (51 mm) pipe connecon. With the use of a pipe reducer, installers can use a
3 in. (76 mm) pipe for the combuson air and exhaust.
Remove and discard the screw from the
combuson air vent connecon.
Remove and discard the combuson
air vent cap.
Install the combuson air vent pipe.
Ensure it is properly seated.
Secure the combuson air vent pipe to the
combuson air vent connecon with the
supplied screw.
Install the exhaust vent pipe. Ensure it is
properly seated.
Secure the exhaust vent pipe to the exhaust
adapter ring with the supplied screw.
Combuson Air Vent Pipe
Supplied screw
Exhaust Vent Pipe
Supplied screw
Direct Vent (Twin Pipe)
1
1
2
3
4