Question about meeting new floor level

Discussion in 'Toilet Forum discussions' started by Johnnybeltway, Jul 30, 2007.

  1. Johnnybeltway

    Johnnybeltway New Member

    Jul 29, 2007
    I an new here and please bear with me on any rookie mistakes. I am re-doing our mater bathroom with tile. I have attched a picture of the toilet flange. The PVC waste pipe sits inside the floor flange (see pitcure) so in that repsct I dot think it is a true "closet flange".

    I have to reinforce the floor with a 3/8" layer of plywood due to my joist spacing to prevent the tile from cracking. I also will be using Ditra rather than backer board. The current flange will sit even with the new layer of plywood (approximatley). So I will need to raise the flange about 1/2" so I can accomodate the Ditra and tile.

    My question is Do I have to take out the pipe and splice a new longer piece to come up flush with the floor? I was in lowes yesterday and I saw the spacer kits that sit on top of the flanges which also came with rubber gaskets that go between them. They seem like they can do the trick. The thing I worry about is leaking.

    Thanks for your time.

    Attached Files:

  2. markts30

    markts30 Commercial Plumber

    Sep 25, 2006
    Commercial Plumber
    Phoenix, AZ
    I would cut the old flange off and extend the pipe but doing so requires you have enough pipe below the floor to accept the coupling and then later the closet flange...
    If the closet bend is too close to the floor you will not be able to get both on..
    Do you have access to the underside of the floor?
    If so you can cut the closet bend off and attach a new one with a coupling and piece of pipe to extend the riser above the floor level...
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  4. Gary Swart

    Gary Swart In the Trades

    Sep 1, 2004
    Yakima WA
    The flange is supposed to rest on top of the finished floor and be anchored through it into the subfloor. You can compensate for a flange that is slightly too low, but while you are in the position you are in, the smart thing would be do what you have to do to raise the flange to the proper height. If you have access to the drain line under the floor, just cut it off, put in a coupler, a piece of pipe, new closet bend, and a length of pipe. Stuff a rag in the pipe until the floor is laid, then cut it so the flange will set properly, making sure the slots for the flange bolts are oriented so the toilet will set straight before glueing and screwing the it down. Oh yeah! Take the rag out before setting the toilet!
  5. Johnnybeltway

    Johnnybeltway New Member

    Jul 29, 2007
    Well the thing is I dont really have access to the underside. That being could I cut this thing off from above. The next question is how much pipe is "enough" to accept the all that I will need?

    ...this bathroom will be the death of me...

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