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Thread: Pulsating Water Pipes When Filling Toilet?

  1. #1
    DIY Junior Member shw001's Avatar
    Join Date
    Dec 2010

    Question Pulsating Water Pipes When Filling Toilet?

    I have a Toto Drake 1.6 gallon, ADA hight, almost 2 years old. The supply pipes have suddenly started pulsating when I fush. The pulsating is so strong (actually scary) that some pipes in the basement (2 flights down) shake. The pulsating lasts until the tank is full. This does not happen to other fixtures in the house.

    Any ideas what might cause this?

    (I suspect it might be the fill valve. But I have never seen one fail in only 2 years. If it is the valve, could it be repaired, or must I replace it?)


  2. #2
    Retired Defense Industry Engineer jadnashua's Avatar
    Join Date
    Sep 2004
    New England


    First, make sure that the shutoff is fully opened. If that doesn't solve it, if it's a multi-turn valve verses a 1/4-turn one, I'd suggest just replacing it. It's possible the fill valve has some crud caught in it. Depending on which one is in your toilet, if it is the one made for them by Korky, you can replace the seal for about $3 (buy it at Lowes or a plumbing supply house). Takes about a minute, instructions on the card. If your fill valve has a screw on the top, if it is the bad part, you need to replace the whole valve. I'd vote for the shutoff, though.
    Jim DeBruycker
    Important note - I'm not a pro
    Retired Defense Industry Engineer; Schluter 2.5-day Workshop Completed 2013, 2014

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