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    Leenhh's Avatar
    Leenhh Posts: 1, Reputation: 1
    New Member
     
    #1

    Jan 8, 2014, 05:04 PM
    Noise in water pipes
    My water pipes have recently developed a hum or a horn noise in the pipes after using the water. It sounds like a ship in the night honking it's horn. Sounds quiet and far away. This is new. Can you tell me what might be the cause of this?
    hkstroud's Avatar
    hkstroud Posts: 11,929, Reputation: 899
    Home Improvement & Construction Expert
     
    #2

    Jan 8, 2014, 05:44 PM
    Could be a loose washer in the main shut off valve or a defective pressure reducing valve. Most likely a the pressure reducing valve if you have one.

    Feel the pipes in that area, you should be able to feel the vibration in the pipe.

    Edit, Just noticed that you said after
    using the water
    If that means after you close a faucet, it will be the PRV valve.

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