Forum Discussion

shasta24's avatar
shasta24
Explorer
Aug 07, 2013

Water heater question

Good evening everyone. I have installed my new water lines in the Shasta. I was looking at the water heater and it occurred to me that I didn't install a check valve in the cold water side. Is this a must ? I guess the only harm is I could start out with warm water in my bathroom at first, then it would go cold. Its a suburban 6 gallon.
  • Old-Biscuit's avatar
    Old-Biscuit
    Explorer III
    Aug 07, 2013
    If your concern is water flowing from tank back into cold water lines when water is being heated......shouldn't be a problem.
    Water heater tank is designed with an 'air pocket' to absorb the swell from water heating. (Air compresses....water doesn't)

    The PRV will drip when air pocket is lost.
  • ScottG's avatar
    ScottG
    Nomad
    Aug 07, 2013
    It would be very easy to add one using a Shark Bite fitting.
  • mobeewan's avatar
    mobeewan
    Explorer
    Aug 08, 2013
    Check valve, if used, goes in the hot water outlet, not the cold water inlet. Usually used when installing a one valve winterizing bypass.

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