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Thread: Unifit and high toilet flange

  1. #1
    DIY Junior Member kaffine's Avatar
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    Default Unifit and high toilet flange

    I have a problem with a toilet because the flange is a little to high and wont let the toilet rest on the floor I didn't measure it but it seems to be about a 1/8 to a 1/4 inch to high. It is in a slab with a 3" ABS pipe with an outside ABS flange. I tried to dry fit a toilet and it still rocks some.

    I was wondering if the unifit adapter used on Toto skirted toilets would be able to handle the flange being a little high? Thanks.

    TOTO Unifit information
    Last edited by Terry; 06-18-2010 at 06:19 PM.

  2. #2
    Forum Admin, Expert Plumber Terry's Avatar
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    A flange that is 1/8" to 1/4" high is normal.
    And the Unifit would work fine on that too.

  3. #3
    DIY scratch-pad engineer leejosepho's Avatar
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    Are you sure it is actually hitting the flange? I just installed a new toilet for my mother-in-law, and I first had to do a lot of work to get the floor flat so the toilet would not rock.

  4. #4
    Retired Defense Industry Engineer jadnashua's Avatar
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    How high is the flange above the floor? It should have no gap underneath it, and be attached to the floor. Sometimes the concrete finishers don't get the surface level around the flange, and that can mess you up, too. It could have a big hump there as well. It is possible that it is just the floor is unlevel and not flat. Take a straight edge and level, and see how things look. It's possible no toilet would fit well. You must shim the toilet, if required, to ensure it doesn't rock. The UniFit adapter is maybe a little deeper than some toilets, and has square edges, so it might fit better, but not if the floor is messed up. ANy toilet should fit if the flange is installed properly.
    Jim DeBruycker
    Important note - I'm not a pro
    Retired Defense Industry Engineer; Schluter 2.5-day Workshop Completed 2013, 2014

  5. #5
    DIY Junior Member kaffine's Avatar
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    I'll have to measure how high the flange is but it is a bit above the floor and not secured to it. I wont get a chance to do that until the weekend though. Come to think of it none of the toilets I have ever removed have had the flange attached to the floor. Granted I have only pulled 4 toilets but so far none of them have been done right.

    The flange is not sitting on the concrete there is enough of a gap to get a cheap vinyl tile under it. I don't think one of the commercial VCT tiles would fit though. So a little less than an 1/8" off the concrete. The floor around it seems to be flat. When I tried dry fitting the toilet I was able to slide a piece of cardboard under the toilet without it touching the toilet so I think it is sitting on the flange. Also when I looked at how high the flange is compared to the height of the cast support bars on the bottom of the toilet the flange seems to be taller than the support bars. I guess I could always put thicker tile down since it would be easier to change the tile than lower the flange.

  6. #6
    Forum Admin, Expert Plumber Terry's Avatar
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    Thicker tile? and it would look nicer.

  7. #7
    Moderator & Master Plumber hj's Avatar
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    I can normally remove the flange and install a new one at the proper level in about an hour. Can you replace the tile that quickly, and cheaply?

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