Low toilet flange fix help

Discussion in 'Toilet Forum discussions' started by Edward Caldwell, Jul 11, 2021.

  1. Edward Caldwell

    Edward Caldwell New Member

    Joined:
    Jul 11, 2021
    Location:
    San Francisco, California
    I have a new Toto toilet I need to install. When I removed the old toilet I discovered the flange is low and unlevel. It varies from about 1 - 1/4" to 1 - 1/2 " below the concrete floor. The old toilet had 3 wax rings stacked which did seem to work. I tried an extra thick ring with the cone and a regular non-cone ring but that was not high enough. I'd prefer not having to stack more than two rings so looking at the best way/product to extend the flange. I was looking at the Oatey Sit-Rite Kit (1/4" to 1 5/8) or separate extenders to bring flange up to a point that a single wax ring can be used. Since the flange is also not level will that be much of an issue? Any advice on the best corse of action (and product) for this situation would be greatly appreciated.
     
  2. wwhitney

    wwhitney Well-Known Member

    Joined:
    Mar 17, 2019
    Location:
    Berkeley, CA
    How about a picture of what you are dealing with? Best fix would be to raise the flange by extending the pipe, if that's not too difficult.

    Cheers, Wayne
     
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  4. Edward Caldwell

    Edward Caldwell New Member

    Joined:
    Jul 11, 2021
    Location:
    San Francisco, California
    If by using something like the Sit-Rite kit yes but raising flange is not possible as it is set in the concrete floor.
     

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  5. Terry

    Terry Administrator Staff Member

    Joined:
    Aug 17, 2004
    Occupation:
    Plumber
    Location:
    Bothell, Washington
    You might use something like this, it fits inside the waste pipe, and and use spaces under the flange to rise it up.

    [​IMG]
     
  6. Edward Caldwell

    Edward Caldwell New Member

    Joined:
    Jul 11, 2021
    Location:
    San Francisco, California
    How important is it for the flange to be level? I see some extender products that can be leveled with a belt sander. And what’s the minimum the flange should be above floor for proper sealing with the wax ring?
     
  7. LLigetfa

    LLigetfa DIYer, not in the trades

    Joined:
    Feb 6, 2011
    Occupation:
    Semi-Retired
    Location:
    NW Ontario, Canada
    Perhaps you mean Set-Rite?



    If the existing flange is badly out of level, you can use a belt sander to adjust the shim or shims.
     
  8. Terry

    Terry Administrator Staff Member

    Joined:
    Aug 17, 2004
    Occupation:
    Plumber
    Location:
    Bothell, Washington
    A flange doesn't need to be perfectly level when using a wax seal, or even a foam rubber seal.
    Any spacers being used go under the flange, not on top.
     
  9. Edward Caldwell

    Edward Caldwell New Member

    Joined:
    Jul 11, 2021
    Location:
    San Francisco, California
    I added some spacers now I am slightly above flush on the low end and just under 1/2" above the floor level on the high side. Is the high side OK and I can just add a normal wax seal? The toilet itself sits fine on the floor, no rocking what so ever.
     
  10. Reach4

    Reach4 Well-Known Member

    Joined:
    Sep 25, 2013
    Location:
    IL
    Why stop 1/2 inch below the floor? Maybe go 1/8 to 1/4 above the floor if you have the rings. Then a single wax ring would top it off.

    You should worry about gasses going between the spacer rings. If you are going to have spacer rings above the flange, slather the flange and the rings with wax.

    A bead of silicone adhesive between the spacers might be even better, but I would go wax under the bottom spacer so that you can pull this if you need to. I am not a pro.
     
  11. wwhitney

    wwhitney Well-Known Member

    Joined:
    Mar 17, 2019
    Location:
    Berkeley, CA
    I think you misread his comment--the high side is above the floor by an amount that is just under 1/2".

    1/2" sounds too much to me, as does the ~3/8" delta between the sides, but I don't have the experience to say it wouldn't work.

    Cheers, Wayne
     
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