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Water heater
Vent pipe
Intake pipe
Exhaust pipe
Vent terminal
5) Connect the heater and vent terminal using 4" diameter supply and exhaust pipes.
Make sure the connections are secure
and take measures to prevent exhaust
gas from leaking. Use Category III
listed vent pipe approved to UL 1738.
Seal any connections that are not gas
tight using a high temperature silicone
sealant.
Connect the vent pipe to the vent terminal as follows: