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

    Nov 9, 2007, 09:31 AM
    Water hammer effect
    When I flush the toilet, after the tank fills, there is a loud shut off knocking sound. This happens in both bathrooms. Also, both toilets ghost flush during the night several times--first in my bathroom and then a minute later in the main bathroom. What can I do?
    ballengerb1's Avatar
    ballengerb1 Posts: 27,378, Reputation: 2280
    Home Repair & Remodeling Expert
    		  
    #2

    Nov 9, 2007, 09:51 AM
    The noise you describe is water hammer due to the abrupt shut of the ballcock. It can be eliminated by adding a screw on anti hammer device like those sold by Sioux. What is a ghost flush?

    Sioux Chief Plumbing Parts & Accessories
    KISS's Avatar
    KISS Posts: 12,510, Reputation: 839
    Uber Member
    		  
    #3

    Nov 9, 2007, 10:20 AM
    I can't figure out anything that would flush a toilet automatically during the night, but I's like to ask a question:

    1) Is this a pressure assist toilet2 Plastic tank inside tank.

    And I have a suggestion in addition to bb's.

    What's the house water pressure?
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