Problem with the Flapper on American Standard Cadet 3, 4027.016 toilet

Discussion in 'Toilet Forum discussions' started by John Milich, May 7, 2012.

  1. John Milich

    John Milich New Member

    May 7, 2012
    herbal medicine making
    Ithaca, New York
    The flapper on the American Standard Cadet 4027.016 toilet leaks.
    The water level in the tank drops to the extent that, following each flush, the fill valve turns on every 20 minutes.
    After replacing the flush valve three times and the flapper five times, including the installation of a brand new, out-of-the-box American Standard Cadet 4027.016 toilet, we obtained the same result on each occasion: a leaking flapper.
    My plumber and I have concluded that this is due to a basic design flaw in the flapper of this American Standard model.

    We have spoken with American Standard tech support who absolutely denies that there's such a design flaw, leaving us with few options.
    The big question: Is there a flush valve from another manufacturer that's compatible with this model?
    Last edited by a moderator: May 7, 2012
  2. Cookie

    Cookie .

    Oct 7, 2005
    Rather than a design flaw it sounds like a manufacturing flaw with the flush valve. As far as I know, I have never heard of this problem with their flappers. The design has worked for a long time flawless. Or, it could be a flapper manufacturing flaw. Bring the toilet back and go to an entirely, different big box store, ie, if you bought it at Lowes' go to HD.
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  4. Terry

    Terry Administrator Staff Member

    Aug 17, 2004
    Bothell, Washington
    I would first make sure that the fill tube is not placed down the overflow tube.
    Doing that will siphon the tank.

    Other then that, it is a puzzle.

  5. jadnashua

    jadnashua Retired Defense Industry Engineer xxx

    Sep 2, 2004
    Retired Systems engineer for defense industry.
    New England
    Simple test, run your finger around the seal where the flapper goes. If it has a lump or divot in it, no flapper will seal properly.
  6. Cookie

    Cookie .

    Oct 7, 2005
    It could be the two arms that hold the flapper have a manufacturing problem not allowing the flapper to fall flat on the valve.
  7. Timberdinky

    Timberdinky New Member

    Sep 3, 2017
    Raleigh, NC
    There is at least one problem. some flappers hang up in the "arms" that hold the flapper - thus causing the flapper to occasionally not close completely - just cost me $ 45 in extra water/sewer bill USING a FLUIDMASTER # 540 Flapper adjusted so that NO drain holes, in the flapper, are open [adjustment ring set to '10'].

    I find the Korky 3" universal Flapper # 3060, to have NO adjustment that works correctly (for this toilet). To use this flapper, you have to train yourself to hold the flush handle down for a few extra Milli-seconds, else you will not get enough water flow to do the job. Adjust this flapper to all drain holes CLOSED.

    MY CONCLUSION - the the two arms that hold the flapper have a manufacturing problem - perhaps too "wide" to allow easy rotation? Thinking of replacing the tubing arms.

    I'm still wading thru the (excellent) forum, looking for a SOLUTION - thank you

    ONE MORE thought - perhaps a slight change in the height (from toilet tank bottom) and/or a slight change in the angle of the circular opening of the surface whereon the flapper rests, would facilitate better flapper sealing?
    Last edited: Sep 4, 2017
  8. Reach4

    Reach4 Well-Known Member

    Sep 25, 2013
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