Measuring Rough IN

Discussion in 'Toilet Forum discussions' started by smurfmeister999, May 18, 2006.

  1. smurfmeister999

    smurfmeister999 New Member

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    I have a toilet (unnamed but with a UPC stamp) and I'm not sure how to measure the rough in. When I measure from the wall to the centre of the bolts I get 11 1/4 inch. I don't know whether the bolts are always aligned with the center of the drain or not. The wall is ceramic so I'm not sure whether it's shortening the actual rough in length or not. If my measurement is correct, will a toto 12 inch rough in toilet fit?
  2. Gary Swart

    Gary Swart In the Trades

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    The bolt holes are in the center of the the drain outlet, so that's measure from that point to the finished wall. Usually there is a little fudge factor, but don't count on it too much.
  3. jimbo

    jimbo Plumber

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    8,997
    Location:
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    Don't measure any base molding. In your case , the rough may have been set at 12 assuming just drywall. When the ceramic was added, it took away 1/2".


    You will have to look at actual spec sheets for toilets. Many toilets have 1/2" tolerance; some will NOT work with being 3/4" under.
  4. Terry

    Terry Administrator Staff Member

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    15,120
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    The Toto Drake and the Ultramax will work with 11-1/4" on the rough-in.
  5. maddfrog

    maddfrog New Member

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    Location:
    California
    I'm in the same boat - I measured from the drywall to the center of the bolts and it's 11 1/4. I'm just beginning a bathroom remodel and we're planning on replacing the toilet during the process.

    How can I determine whether a specific toilet will work?

    Are there any options for making a toilet designed to work with the standard 12" rough-in work other than moving the flange?
  6. Terry

    Terry Administrator Staff Member

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    15,120
    Location:
    Bothell, Washington
    Almost all toilets are built with 3/4" of fudge room in the back.

    If you click on a toilets pdf spec file, it will show the back wall clearance.
  7. maddfrog

    maddfrog New Member

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    37
    Location:
    California
    Thanks

    Good to know - thanks.
  8. smurfmeister999

    smurfmeister999 New Member

    Messages:
    2
    I checked the specs on my toilet and it appears that it has a 5/8" space allocation between it and the wall. If I add a 1/4" for the ceramic wall I should be ok. Thx
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