Shower valve may be 1/8" too far back -- will we be OK?

Discussion in 'Plumbing Forum, Professional & DIY Advice' started by DavidTu, Nov 16, 2012.

  1. DavidTu

    DavidTu Member

    Messages:
    239
    Location:
    Seattle, WA
    Not sure where our calcs went wrong but we've got an American Standard R540 valve installed--very difficult to move at this point!--and the tile guy says that the tile will end up about 1/8" proud of the Max dimension on the plaster guard. I understand the meaning of Max... but is there likely still some flexibility here are are we going to be screwed if we install the tile w/o moving the valve out?

    http://www.americanstandard-us.com/assets/documents/amstd/parts/Parts_2234.pdf

    A deep rough kit can be ordered
    Last edited by a moderator: Nov 17, 2012
  2. kreemoweet

    kreemoweet Member

    Messages:
    377
    Location:
    Seattle. WA
    It's been my experience that Max means just that, i.e., if the valve is recessed too far, then stuff doesn't work, like
    you can't screw the handle on. There is plenty of leeway/flexibility in the range of depth given in the specs, and it is
    almost always a problem when people try and jam the valve up to one extreme or another.
  3. DavidTu

    DavidTu Member

    Messages:
    239
    Location:
    Seattle, WA
    Was afraid someone would say that. Anyone have experience with this particular valve or similar that says differently?
  4. jadnashua

    jadnashua Retired Defense Industry Engineer xxx

    Messages:
    22,319
    Location:
    New England
    Your choices generally are: move the valve, or search out for an extension kit (which may or may not be available). Most people don't like the look of the handles sticking out further, but that's what you get for not getting the valve-to-finished wall distances within specs.

    At 1/8", I might try loosening the valve to the blocking and try to wedge it out a little, but that's generally not a great idea (but 1/8" isn't much!).
  5. hj

    hj Moderator & Master Plumber Staff Member

    Messages:
    27,255
    Location:
    Cave Creek, Arizona
    IT strictly depends on the trim for the valve. Some max/min dimensions are "suggestions" with a lot of latitude, while others really mean it when they say "maximum". At least, if you are too deep and it does not work, you can get an extension. It is when it is too shallow that problems occur, because you cannot get a "shrinker" to make things fit.
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