new tub and shower faucet rough-in

Discussion in 'Shower & Bathtub Forum & Blog' started by ditchdoc, Nov 16, 2008.

  1. ditchdoc

    ditchdoc New Member

    Nov 16, 2008
    Installing new tub-tile-shower-faucets and am wondering if there is any built in leeway. What i mean is that the installation directions show "finished wall" Does this mean with tile, or can I rough-in to the backerboard? I'm just wondering if I need to figure in the thickness of my tile or is there usually some fudge-factor built in to the design? Sorry if this is a dumb question. My faucet set is an American Standard single-handle design. Any hints would be appreciated.
  2. Redwood

    Redwood Master Plumber

    Dec 15, 2007
    Service Plumber
    There is a fudge factor built in but it must be installed within that factor.
    See the instructions for your valve the dimension will be listed.
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  4. jadnashua

    jadnashua Retired Defense Industry Engineer xxx

    Sep 2, 2004
    Retired Systems engineer for defense industry.
    New England
    The rough-in valve MUST be installed so that the FINISHED wall will be within the min/max marks - that means the tile installation. I prefer it to be recessed most of the way. SOme people don't like it sticking so far out if at that end of the range. Too far in, and you won't be able to attach the trim. Too far out and the trim won't snug up to the finished wall.
  5. hj

    hj Moderator & Master Plumber Staff Member

    Aug 31, 2004
    Cave Creek, Arizona

    The leeway is the maximum/minimum lines on the plaster ground. If the finished tile is not between those lines you run the risk of sticking out too far and being out of luck, or needing an extension and hoping the manufacturer makes one.
  6. ditchdoc

    ditchdoc New Member

    Nov 16, 2008
    Thank you, gentlemen
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