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Thread: toilet tank fills repeatedley

  1. #1

    Unhappy toilet tank fills repeatedley

    My Toilet w/Flushmaster fill valve fills for a/b 15 seconds every few minutes. I thought ball-flap was leaking so I replaced it w/a new Flushmaster ball-flap and base. Water keeps running as before.

    Any suggestions. Thanks.


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


    Not all flapper valves are created equal...some of them end up getting to you slightly warped. Somewhat depends on the packaging and the quality of the things. The new one could still be leaking. Quick way to tell, use some food coloring in the tank, see if any leaks into the bowl. Sometimes the seat has deposits on it...rub you finger around it and make sure it is clean and smooth. The gasket around the flapper hole could be bad, but it might leak onto the floor rather than through to the bowl.
    Jim DeBruycker
    Important note - I'm not a pro
    Retired Defense Industry Engineer; Schluter 2.5-day Workshop Completed 2013, 2014

  3. #3
    Plumber jimbo's Avatar
    Join Date
    Aug 2004
    San Diego


    There is a small black refill tube which runs from the fill valve over to the overflow tube. The end of that tube needs to be ABOVE the tob of the overflow, with a little clip which directs water down into the overflow.

    If that little tube is pushed down into the overflow, it will siphon water out of the tank, causing the "ghost" flush symptom you describe.

  4. #4

    Thumbs down constantly refilling tank

    Replaced the flapper, replaced the flapper gasket, replaced the refill tube and clamp so water comes in above top of overflow tube. Water still runs just as before, about every 20 min. for 20 seconds. Any more suggestions?

  5. #5
    Plumber Cass's Avatar
    Join Date
    Nov 2005


    You may have a crack in the tank allowing the water out.

    Or the seal on the douglas valve may be leaking but these are rare (The douglas valve holds the flapper)

    When you replaced the flapper did you use a Korky brand?

    Check this, Turn the water to the toilet off and drain the tank down. Remove the flapper, and run your finger, lightly, around the edge that the flapper would seal on if it was in place. You are feeling for anything but a perfectly smooth surface. There could be hard water deposits built up on it not allowing it to seal right.

    If there is, try using your fingernail to break it off. Don't use a knife or similar as it could gouge the surface and ruin the surface making things worse.
    Last edited by Cass; 04-02-2006 at 05:04 AM.

  6. #6
    Moderator & Master Plumber hj's Avatar
    Join Date
    Aug 2004
    Cave Creek, Arizona

    Default flapper

    You said you used a ball flapper and base. Is that the piece that glues on? If so that could be your problem if you did not attach it correctly, but in most cases you should not have used it anyway.


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