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Water Heater Expansion Tank

How do you size an expansion tank. I will be replacing all piping & gas heater. I see 2 gallons & 5 gallons at the store...

I will be placing a 40 or 50 gal. gas water heater.


Re: Water Heater Expansion Tank

Two gal. is large enough.


Re: Water Heater Expansion Tank

Two gallon should be fine. just make sure you pressure the tank to your water pressure. Usually they come precharged at about
40lbs. If you have a water pressue gauge just set exp tank the same. pretty easy task.

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