humming motor sound in our wall

Discussion in 'Plumbing Forum, Professional & DIY Advice' started by tjnj25, Apr 18, 2013.

  1. tjnj25

    tjnj25 New Member

    Apr 18, 2013
    we have been having a strange loud "humming" sound in our wall for the last 24 hours. It sounds similar to a motor running is the closest I can describe.

    We had the water utility out and they said it was not the water, toilet or water heater, but it seems like the sound is vibrating from the main water supply area- I attached a pic- the lower pipe is vibrating more than the top. and it changes tune/ vibration slightly when the lever is pulled to turn water off. But sound does not go away.

    I shut the water supply off and drained all of the pipes and left water off for 45 minutes. and the sound is still buzzing- and the pipe/ wall is still vibrating even with no water in it, I also shut off all of the power in the house and it still humms.

    I checked with the neighbour whom we share a wall with in out townhouse and they have a large fish tank directly on opposite side, but we cannot hear any noise from their side. They said they have not done any renovations or anything to wall (there is a firewall in between also)

    Has anyone else had this similar problem here? any ideas on what it could be?

    Attached Files:

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  2. carloliveira

    carloliveira New Member

    Mar 11, 2012
    Denville, NJ
    the fish tanks air supply pump is making the humming sound.....maybe
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  4. LLigetfa

    LLigetfa DIYer, not in the trades

    Feb 6, 2011
    NW Ontario, Canada
    If I had to guess (and I must) I'd say the there is a fault with the neutral on the electrical panel and current is being carried by the grounded piping. I was once called out to troubleshoot an electrical issue that turned out to be an open neutral. There was so much current carried by the copper pipe that it made the water warm.
  5. DonL

    DonL Jack of all trades Master of one

    Mar 30, 2011
    Rocket Scientist
    Houston, TX
    That could be.

    A doorbell transformer may do the same, or a Venting Fan Motor.

    Good Luck.
  6. bluebinky

    bluebinky Member

    Aug 31, 2011
    Software Engineer
    Santa Clara, CA
    Is the noise "on" 100% of the time? My wild guess is the neighbor's refrigerator.
  7. tjnj25

    tjnj25 New Member

    Apr 18, 2013
    Update- leak in pipe between curb and main supply meter

    thanks for your suggestions- turns out its a leak in the pipe between the curb stop and our main water meter. The water utility shut off both and the sound went away, he used a pole with headphones on the curb stop to verify leak in pipe. We live in a townhouse on a concrete slab and the pipe is 4 feet underground, about 15 feet from curb to meter.

    The condo association says its our responsibility to the front door- and they are responsible if out on front lawn. Has anyone had similar situation? we think the Condo is responsible for the pipe all the way to our meter, since its under our unit, and then we handle whatever is inside our unit walls.

    thanks again everyone.

    also- below are pages from our bylaws- If I'm reading correctly- I believe it backs up Association responsibility?

    1.jpg 2.jpg 5.jpg 7.jpg
    Last edited: Apr 20, 2013
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