Height of tub spout and valve

Discussion in 'Shower & Bathtub Forum & Blog' started by miamicanes, Nov 10, 2009.

  1. miamicanes

    miamicanes New Member

    Messages:
    103
    Location:
    Pembroke Pines, FL
    Is there any standard (code, tradition, or otherwise) regarding how far a roughed-in pipe for a tub filling spout should be above the top surface of the tub?

    Likewise, other than the constraints imposed by the mixing valve itself (8-18" from the valve down to the elbow below), is there any standard (code, tradition, or otherwise) governing how high the controls should be? All things equal, I'd prefer to put the spout at some reasonable height, then put the mixing valve as high above that as I'm allowed to. Even though it would probably be higher than normal for tub controls, it would be more convenient for the specific use case that will apply to ~99.9% of my own use... showering.
  2. jadnashua

    jadnashua Retired Defense Industry Engineer xxx

    Messages:
    22,316
    Location:
    New England
    The tub spout outlet must be higher than the flood rim of the tub to preclude possible backflow contamination to the water supply. Keep in mind the neck length on tub spouts offset differ, so where the pipe is verses the outlet will matter. I don't know the exact number, but I would expect something in the order of 2" gap to the tub flood rim or so is required.

    Some valves, if also used for a shower, require the valve to be within a certain distance of the tub spout to ensure the resistance is less, so it doesn't back up and water flow out the shower when you haven't used the divertor. Many systems have both the path to the showerhead and the spout both open to the valve simultaneously, so the one with the least resistance gets the flow. These details would be in the installation manual of the particular valve you select. If you have a separate divertor valve, rather than using a spout with one, then the distance probably doesn't matter, since a closed valve would prevent water from getting to the showerhead when you didn't want it to.
Similar Threads: Height spout
Forum Title Date
Shower & Bathtub Forum & Blog Tub Spout Height Oct 9, 2010
Shower & Bathtub Forum & Blog Shower Riser Height for Handheld Shower Jul 8, 2014
Shower & Bathtub Forum & Blog Shower curb height Mar 15, 2014
Shower & Bathtub Forum & Blog Raise Shower Head Height? Feb 21, 2014
Shower & Bathtub Forum & Blog max height for ceiling rain shower head? Nov 30, 2013

Share This Page