17" rough in with a space the size of Texas behind tank

Discussion in 'Toilet Forum discussions' started by Ruby, Jun 9, 2014.

  1. Ruby

    Ruby New Member

    Messages:
    1
    Location:
    Connecticut
    Just purchased our 1940's home and discovered that our toilet has a 17" rough in, and the previous owners have a 12' rough in toilet on it. We are looking into the Toto-unifit set up. ..Or is there something else we should be looking at? (and no, adding a cabinet behind the toilet isn't really the solution I am looking for).
  2. Terry

    Terry Administrator Staff Member

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    14,943
    Location:
    Bothell, Washington
    Right now there are very few bowls that can be moved back even two inches.
    The TOTO models with the Unifit, can be purchased with the optional 14" Unifit, which allows shifting the bowl 2"
    That still puts you out there a ways, but does give a bit more leg room while sitting.

    [​IMG]

    14" Unifit adapter
    Last edited: Aug 30, 2014 at 2:47 PM
  3. Reach4

    Reach4 Active Member

    Messages:
    2,161
    Location:
    IL
    If the closet flange is readily available from your crawl space, you might be able to reasonably get your rough in changed to 12 inches. Consider posting an under-side photo (800 pixels max). Were you planning to re-do the bathroom floor? If so, think about moving the flange as part of that project.
  4. R1ck

    R1ck New Member

    Messages:
    3

    Is it possible to modify a Toto unifit out to 16"? from the photos I've seen, it looks like it's made from regular plumbing pipe...

    Rick
  5. jadnashua

    jadnashua Retired Defense Industry Engineer xxx

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    21,949
    Location:
    New England
    I think this would be risky. It might work, though. The siphon jet can only push stuff so far, and adding a couple more inches may be more than it can handle. The start of the flush has to get the entire length moving in order to create the siphon that then pulls the rest of the waste to follow it out and then down.
  6. Gary Swart

    Gary Swart In the Trades

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    7,341
    Location:
    Yakima WA
    While moving the flange would be the best option, there must have been a reason the original flange was roughed in at 17". In my opinion, altering the Unifit adapter would not be wise even if possible. The 14" adapter would be the best second option if the flange relocation proves to be unreasonably difficult. You'd be left with a 3" space behind the tank, but that isn't a great deal more than many toilets with standard flanges have. My Dartmouth sits on a 12" (exact) flange and has a 2-1/4" space between the tank and wall, so an additional 3" wouldn't be all that bad.
  7. R1ck

    R1ck New Member

    Messages:
    3

    The toilet is in a daylight basement unit in a condo built in the 60's, with the flange cast into the concrete slab. Relocating the flange would probably involve a jackhammer, not to mention the approval of the condo board...not gonna happen. All the toilets in the building were replaced several years ago with basic/cheapo 12 rough low flow units on a city utility program to reduce water usage. I think that the building was done with 16 rough throughout, 'cause everybody complains about how far the 'new' 12" toilets are from the walls...my speculation is that the original plumbing was planned by an old-school plumbing guy, since I've heard that 16 was more common 20 years earlier...

    I'll just get the Toto unifit 14. From what I've measured, the two inches going from 12 to 14, plus the dimensions of the Toto bowl front will give me close to 3" setback on the front of the toilet. Maybe I can finally re-hang the master bathroom door...

    Thanks

    Rick
  8. Gary Swart

    Gary Swart In the Trades

    Messages:
    7,341
    Location:
    Yakima WA
    I'm sure not an old school plumber, but there are some on this forum that are and I don't recall any of them ever mentioning that 16" was a normal rough in the the days of yore. Maybe HJ or Terry might expand on this.
  9. R1ck

    R1ck New Member

    Messages:
    3

    I saw something on another thread on this board about 16 rough being done in the 30's and 40's... I suppose that the other possibility is that after the rough was done, during the framing of the condo they moved the wall slightly for some reason... And it's not the space behind that's the issue - it's that the current 12 toilet on a 16 rough doesn't let the small bathroom door open fully.

    Rick
  10. Terry

    Terry Administrator Staff Member

    Messages:
    14,943
    Location:
    Bothell, Washington
    In the 20's with tanks that mounted on walls, they used a 14" rough.
    There never was a 16" unless the framing was missed.
    As plumbers, we shoot for 12"
    Sometimes because wood is in the way, we wind up at 10" or 14", or close.
    On a concrete pour, things can get knocked around, or they might know exactly where walls will be framed.
    Often, the lower floor was left unfinished, and it was years later before someone decided to layout a room.
  11. Gary Swart

    Gary Swart In the Trades

    Messages:
    7,341
    Location:
    Yakima WA
    One more thing you might want to consider is changing the swinging door to a pocket door. This can greatly increase the usable floor space in a small room.
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