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Thread: Multiple drainings per flush

  1. #1

    Question Multiple drainings per flush

    We had a toilet start leaking into the (unfinished) basement. I pulled the toilet and replaced the wax ring. While I was at it, I replaced the flap and fill valve with a "whisper quiet" unit. The leak is now fixed, but whenever we flush the toilet, the bowl empties 2, sometimes 3, time before it begins to fill.

    The toilet is a 12 year old Kohler 2 piece normal (non-pressurized) unit. The new guts are a Flushmaster complete kit from Home Depot.

    Any ideas are appreciated.

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


    My guess is that the flapper valve is dumping more water than the thing was designed for. You probably need either an adjustable flapper valve, or the exact replacement from Kohler.
    Jim DeBruycker
    Important note - I'm not a pro
    Retired Defense Industry Engineer; Schluter 2.5-day Workshop Completed 2013, 2014

  3. #3


    The flapper that comes with the fluidmaster kit is adjustable. Look at the directions carefully to see how to adjust it.

  4. #4
    Plumber jimbo's Avatar
    Join Date
    Aug 2004
    San Diego


    If your Kohler is a Wellworth, the original flapper had a foam float attatched to the chain. The position of the float kept it open just the correct length of time. Your generic flapper uses a timing vent, and basically allows all or most of the water in the tank to ruu out. Wellworths are noted for doing a "triple" when this happens.

  5. #5


    Thanks all for the information. Can't tell you the specific Kohler model - they were here when we bought the house. The old flapper didn't have any type of float, but it could have been replaces at some point. I also checked the new flapper that came with the kit and checked Fluidmaster's web site, and it's not one of the adjustable kind.

    So I'll be going to Home Depot on the way home tonight to look at my options. Worst case I can put the old flapper back on until I can find one that works properly.


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