Check Valve for handheld shower

Discussion in 'Shower & Bathtub Forum & Blog' started by IAmLulu, Nov 21, 2013.

  1. IAmLulu

    IAmLulu New Member

    Messages:
    7
    Location:
    CA
    We're doing a DIY bathroom remodel. We will be installing a Sterling tub/shower and surround. We plan to have only one shower head, which will be a Grohe Handheld Shower. We are putting in a Hansgrohe Wall (water) Outlet, a Mount for the handheld shower, a hose, of course, but not a bar. The Diverter will be on the tub water Spout. Some Wall Outlets come with a Check Valve...I'm thinking I don't need a check valve, because we will have a Diverter...Am I correct, or do I need to get a wall outlet with a check valve?
    Thank you for any advice you have to offer...
  2. Smooky

    Smooky Member

    Messages:
    650
    Location:
    NC
    Do you mean a vacuum breaker instead of check valve?

    Some municipalities require that a fixture have an air gap or a proper anti-siphon vacuum breaker. If the hose hangs below the rim of the tub then it might be required.
    Last edited: Nov 21, 2013
  3. IAmLulu

    IAmLulu New Member

    Messages:
    7
    Location:
    CA
    Smooky, In the description of the Hansgrohe Wall Outlet with dual Check Valve, it says "Double check valve to protect against backflow".
    Last edited by a moderator: Nov 25, 2013
  4. Smooky

    Smooky Member

    Messages:
    650
    Location:
    NC
    My though is that since the back flow preventer is in the wall outlet, it is to prevent tub water from back siphoning into the potable water in case of a loss of water pressure and the sprayer is in a tub full of water. If someone turns on the sink downstairs, water could be siphoned into the system. Most codes do require either an air gap or a proper back-flow preventer. However there are many shower hoses installed that do not have an air gap or a proper vacuum breaker, especially in private homes.


    http://www.hansgrohe-usa.com/articledetail-null-wall-outlet-with-check-valves-27458003.html

    http://www.hansgrohe-usa.com/articledetail-null-wall-outlet-27454002.html

    Hansgrohe also makes a vacuum breaker that can be installed where the hose is attached if it is needed and not built in to the unit .

    http://www.hansgrohe-usa.com/articledetail-null-external-vacuum-breaker-06510000.html
    Last edited by a moderator: Nov 25, 2013
  5. hj

    hj Moderator & Master Plumber Staff Member

    Messages:
    27,242
    Location:
    Cave Creek, Arizona
    The length of the hose will determine whether you need a backflow, or air gap, on the shower outlet. If it can hang below the tub's
    overflow opening, then you would need one.
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