Tub Spout Pipe Type

Discussion in 'Shower & Bathtub Forum & Blog' started by Big Papa, Jan 24, 2013.

  1. Big Papa

    Big Papa New Member

    Jacksonville, Florida
    Is there a law or regulation that requires a specific type of pipe to be used for the tub spout to connect to ? Main question is can CPVC be used instead of galvanized or some other metal pipe ?
  2. cacher_chick

    cacher_chick Test, Don't Guess!

    Land of Cheese
    I don't think there are any professionals installing galvanized steel pipe anymore. CPVC is too flexible and/or likely to snap off under pressure. The inside diameter is also smaller than copper.

    For a solid installation, stub out a piece of copper or thread in a brass nipple.
  3. jimbo

    jimbo Plumber

    San Diego
    If this is a tub/shower set up,virtually every manufacurer speficies you may NOT use CPVC or PEX for the spout connections. The reduced inside diameter reduces flow rate, and will cause leakage from the shower head while using the tub.
  4. hj

    hj Moderator & Master Plumber Staff Member

    Cave Creek, Arizona
    YOU can use anything you want to, but the results can be unsatisfactory.
  5. jadnashua

    jadnashua Retired Defense Industry Engineer xxx

    New England
    If the inspector is good, codes generally require fixtures to be installed per code, and per the manufacturers' instructions...none accept plastic for a tub/shower to the spout.
  6. Terry

    Terry Administrator Staff Member

    Bothell, Washington
    I've been meaning to put a video that I took of plastic piping to a tub spout. It was PEX in that case and it was forcing water out of the shower head.
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