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Thread: Water rushing/splashing noise since 48 hours

  1. #1

    Default Water rushing/splashing noise since 48 hours

    Hi,

    As I presume many plumbers visit this website I have a noise issue that started 48 hours ago which I would appreciate feedback.

    I live in a condo on the second floor of a three floor building. The building was built in 1988.

    48 hours ago noise started in the pipes that are behind the drywall in our bathroom. The sound is water rushing/splashing (almost like being in an aquarium)

    The noise will go on for 10 minutes and completely stop for 15 minutes. The cycle will start back with 10 minutes of the water rushing splashing sound. Noise is coming from pipe behind drywall in bathroom. The water tank & washer/dryer are located behind pocket doors immediately to the left of the bathroom. We can hear the noises here also.

    Thanks for your expertise.

  2. #2
    Master Plumber Redwood's Avatar
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    Dec 2007
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    Connecticut
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    Default

    When you say water tank I assume you mean "Water Heater"?

    I would check the discharge pipe of the T&P valve on the water heater and see if it is hot...
    Be careful it may be very hot...

    T&P Valve

    T&P Valve looking at two sides.
    Last edited by Terry; 08-18-2009 at 11:06 AM.

  3. #3

    Default

    Yes the water heater.

    I verified the discharge pipe of the T&P valve on the water heater and it is hot.

    What does that mean?

  4. #4
    Master Plumber Redwood's Avatar
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    If The discharge pipe is hot it means the T&P valve is opening...

    There are 2 legitimate reasons why a T&P Valve would open:

    1. The Pressure is exceeding 150 PSI.

    2. The temperature is exceeding 210 Degrees F

    The third reason is that the Valve has failed and is leaking.

    The T&P is a vital safety device that prevents the water heater from exploding.
    I would have a plumber check this out ASAP to determine what is causing it to open.

    Click here to see the Mythbusters blow up a water heater

  5. #5
    Journeyman & Gas Fitter Doherty Plumbing's Avatar
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    Jun 2009
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    Penticton, BC
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    810

    Default

    Sounds like you need a new PRV and T&P.

    You may also want to look at installing an expansion tank.

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