Toilet Drain - Rough-In Distance from Wall

Discussion in 'Toilet Forum discussions' started by jacksmith7, Mar 6, 2008.

  1. jacksmith7

    jacksmith7 Member

    Sep 13, 2004
    I know a toilet should be roughed in 12" from the finished wall to center of the drain pipe. Unfortunately, whoever plumbed our new house cut that distance short with the basement rough-in, and only allowed 11". I don't want to use a 10" rough-in toilet and prefer not to use an offset flange. Do most toilet's really require that 12" from finished wall, or can I squeak by with 11"? Thank you.
  2. hj

    hj Moderator & Master Plumber Staff Member

    Aug 31, 2004
    Cave Creek, Arizona

    Yes, some do require less room, but you have to go to a showroom and physically measure the different brands to see if they will fit your space. Normally 11 1/4" is about the shortest dimension for a 12" toilet.
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  4. chelsea

    chelsea New Member

    Mar 6, 2008
    It is funny, we both posted within minutes of each other, and apparently have the exact same problem. :)
  5. Gary Swart

    Gary Swart In the Trades

    Sep 1, 2004
    Yakima WA
    You might want to consider redoing the drain. If this is a new house, you could very well have an issue with the plumber if the building specs were not followed.
  6. Terry

    Terry Administrator Staff Member

    Aug 17, 2004
    Bothell, Washington
    A Toto Drake will work at 11", and a few others will too.

    That, or you can 10" model.
  7. kingnus

    kingnus New Member

    Dec 21, 2007
    Plumbing toilet:

    I have had three new homes built and the plumber always cuts short the 12 inch dim. for the toilet. Any reason you plumbers couldn't make the 12 ruf in a little strong? Say by a quarter of an inch.
  8. jadnashua

    jadnashua Retired Defense Industry Engineer xxx

    Sep 2, 2004
    Retired Systems engineer for defense industry.
    New England
    Sometimes some of the rough plumbing goes in before the walls are up...some of the blame might be on the framers.
  9. Redwood

    Redwood Master Plumber

    Dec 15, 2007
    Service Plumber
    Or, a floor joist might be just where the toilet flange needs to be. As stated above it's the framers fault!:D

    If you look at the specs for toilets you will see a drawing showing the measurements. These show a distance off the wall the toilet is intended to sit. You can use this distance to shoehorn a 12" rough in toilet into a smaller rough in. As Terry stated the Drake is a good example as it has a 1 1/8" space between it and the wall in a 12" rough. You just need to be carefull because the base on some toilets may be the same or less distance and if baseboard is involved it could conflict.
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