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    hummingnoise's Avatar
    hummingnoise Posts: 1, Reputation: 1
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    #1

    Feb 25, 2007, 03:55 PM
    Humming noise when water is running
    I recently had a pressure reducing valve replaced. Since then I hear a humming or even a howling sound whenever I turn on any water source. Even when the toilet is filling, it hums or howls. As soon as I turn the water off, the sound stops. The sound is loud. I checked the pressure and it is only aroun 50psi. I would appreciate any help.
    doug238's Avatar
    doug238 Posts: 1,560, Reputation: 62
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    #2

    Feb 28, 2007, 05:24 AM
    Either you have a bad prv or the main valve is not open all the way. Is the prv installed in the right direction? There is a directional arrow on it.
    inrohit28's Avatar
    inrohit28 Posts: 4, Reputation: 1
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    #3

    Jul 1, 2012, 10:57 PM
    I have same problem. I had pressure of 150PSI. I figured PRV is gone. I recently changed my PRV at the front inlet. Water pressure is 60 PSI. but, I am now getting humming noise when I turn on any faucet in the house. What is wrong?
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