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Thread: Upflush Toilet

  1. #1

    Default Upflush Toilet

    Upflush toilet problem w/ pics
    We have an up-flush under floor toilet that leaked and caused the sub-floor plywood above the tank/under the toilet to rot. As a result we did not use the toilet for several years and now want to repair it. The top of the plastic tank has warped slightly and there is a 1 1/8" to 1 1/4" gap between the top of the tank and the top of the subfloor, around the tank opening. Pictures are attached.

    How do we get a reliable seal between the toilet and the tank?

    Mods: sorry meant to post in Toilet forum please move if you like.
    Last edited by patsy3; 01-08-2010 at 04:22 PM. Reason: posted in wrong forum

  2. #2
    In the Trades Gary Swart's Avatar
    Join Date
    Sep 2004
    Yakima WA


    First, let me tell you I know absolutely nothing about up flush toilets. However, it is pretty obvious that the plastic tank must be sealed to be able to use it. I really do not see this as a DIY job. In fact, I have serious doubts that a professional can repair it. My advise to you is to have a professional look at it and go from there. Is it possible to replace the tank? Let me rephrase that. Would it be worth the expense to replace it? Almost anything is possible given enough money to throw into it.

  3. #3
    Moderator & Master Plumber hj's Avatar
    Join Date
    Aug 2004
    Cave Creek, Arizona

    Default toilet

    The toilet is intended to sit on the tank. ANYTHING between it and the tank will be a possible leak especially if it is wood which will absorb the water flowing through the opening.


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