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

    Feb 3, 2009, 12:13 PM
    Noise in water lines
    I recently changed the heat element in the hot water tank and now when we flush the toilets or run water for very long we get a humming type sound that goes for a minute or so then seems to stop, it will also stop if we run a faucet but then starts when it is shuts off until its done.
    JJCH's Avatar
    JJCH Posts: 122, Reputation: 7
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    #2

    Feb 3, 2009, 12:18 PM

    Sounds like a classic case of water hammer (water pressure too high). However, this should have nothing to do with changing a hot water tank element considering it's happening when you flush a toilet (toilet doesn't use hot water, ofcourse). When you shut the water off to the tank to change the element, did you use a shutoff valve to the tank, or did you shut the water off to the whole house?
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