Expansion Tank (Potable Water)

Select a tank that:

is rated for potable water

is sized according to applicable code (i.e., IPC, IRC, IBC) and manufacturer specifications

If conflict exists between code and manufacturer specifications, apply the more restrictive requirement

Locate the expansion tank on the cold water inlet to the water heater between the water heating equipment and the required shut off

Install expansion tank in accordance with the manufacturer's installation instructions and applicable code

If conflict exists between code and manufacturer specifications, apply the more restrictive requirement

Support expansion tank so that it does not move or sag using rigid support material that is able to support twice the weight of the tank filled with water

Set the pressure in the expansion tank to match the incoming water pressure

Provide occupants/owners with user's manual, warranty information, installation instructions, and installer contact information