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  1. 02-28-2017, 05:22 AM #1
    Jeff Zehnder's Avatar
    Jeff Zehnder
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    Default water heater expansion tank

    Are expansion tanks required at water heaters?

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  2. 02-28-2017, 06:07 AM #2
    Garry Sorrells's Avatar
    Garry Sorrells
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    Default Re: water heater expansion tank

    Think the answer you are looking for is between the last shutoff valve and water heater.

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  3. 02-28-2017, 06:48 AM #3
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    Jerry Peck
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    Default Re: water heater expansion tank

    Yes, no, and maybe

    If there is no backflow device (check valve) or pressure regulator - no ... unless water utility requires it.

    If there is a backflow device or pressure regulator - yes ... except that the code only requires a means to control thermal expansion, so most AHJ permit expansion tanks or pressure relief valves (not the T&P relief valve).

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