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  1. #1
    Join Date
    Dec 2009
    Posts
    16

    Default 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.

    Thanks

  2. #2
    Join Date
    Feb 2010
    Location
    South*East
    Posts
    1,183

    Default Re: Water Heater Expansion Tank

    Two gal. is large enough.

    John

  3. #3
    Join Date
    Dec 2008
    Location
    Midwest
    Posts
    159

    Default 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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