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Thread: Hot water pressure lowers when another faucet opens.

  1. #1

    Default Hot water pressure lowers when another faucet opens.

    If I am in the shower and my wife uses the bathroom sink, the hot water in the shower will decrease until she is finished.

    I had the hot water tank replace 4 years ago and this is when it started. Prior I had no problem.

  2. #2
    Master Plumber Redwood's Avatar
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    Dec 2007
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    Connecticut
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    7,463

    Default

    I would suspect the valve that is on the supply to the water heater to be the problem. It is probably either not open all the way or, it make be a gate valve broken in the partially closed position.


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