Grohe shower head will not shut off with tub filler

Discussion in 'Shower & bathtub Forum & Blog' started by rspage, Aug 23, 2013.

  1. rspage

    rspage New Member

    Messages:
    2
    Location:
    Indiana
    Just installed a Grohe Eurosmart 19-913 tub & shower control.

    Whenever we use the tub filler, the shower head is on at half volume.

    Pulled out the mixing cartridge and reset it, but that has little to do with volume control and didn't help.

    The shower is controlled by a push-down knob on the tub filler. When we use the shower head, the tub filler is shut off and everything functions fine.

    But when we use the tub filler, the shower head is running continuously at half volume.

    Ideas?
  2. hj

    hj Moderator & Master Plumber Staff Member

    Messages:
    26,684
    Location:
    Cave Creek, Arizona
    You installed the valve upside down, you used PEX or some other plastic for the drop down to the tub spout, or the valve needs a "twin ell" and you went directly off the top of the valve, take your pick, but it should be one of these three, and most likely the last one from your description.
  3. rspage

    rspage New Member

    Messages:
    2
    Location:
    Indiana
    The valve is certainly right side up.

    I did use PEX from valve to a drop ear elbow and then a galvanized nipple out for the tub spout.

    What the heck is a "twin ell" ?
  4. Terry

    Terry Administrator Staff Member

    Messages:
    15,050
    Location:
    Bothell, Washington
    That WILL NOT work.
    PEX can't be used for tub spout piping.

    And chuck the galvanized while you are at it and go with brass. Unless you like a little rust first thing in the morning when you open the tub valve.
    The drop to the tub spout can be full size copper or nipples.

    NO CPVC, NO PEX

    [​IMG]

    Grohe rough for a slip-on spout

    [​IMG]

    Hansgrohe rough with a 3/4" drop ear that gets replaced with a 3/4" brass nipple.
    The hammer arrestors add nothing of value here. The valve is too slow closing for them to make a difference.
    Last edited: Aug 23, 2013
  5. jadnashua

    jadnashua Retired Defense Industry Engineer xxx

    Messages:
    22,055
    Location:
    New England
    Grohe usually specifies you use a twin-ell to your showerhead from the divertor tub spout. Unless you threw them away, carefully read and review the pictures in the installation instructions.

    Attached Files:

  6. hj

    hj Moderator & Master Plumber Staff Member

    Messages:
    26,684
    Location:
    Cave Creek, Arizona
    The top opening on a valve is NOT always for a shower riser, (except for a shower only installation), unless the valve has a "restrictor" in the opening to prevent water from coming out of the head when the tub is filling. I do not believe ANY Grohe thermostatic valve has the restrictor.
Similar Threads: Grohe shower
Forum Title Date
Shower & bathtub Forum & Blog Hansgrohe shower valve cartridge replacement issues Jul 31, 2014
Shower & bathtub Forum & Blog Grohe Retrofit Shower System Jul 5, 2014
Shower & bathtub Forum & Blog Shower schematic for Hansgrohe or Moen hand-shower, shower head and rain shower Jun 5, 2014
Shower & bathtub Forum & Blog Acrylic tub installation with Hansgrohe tub shower valve May 1, 2014
Shower & bathtub Forum & Blog HansGrohe Shower installation with i-Box Mar 5, 2014

Share This Page