PLEASE help...had curbless drain installed now shower floods

Discussion in 'Plumbing Forum, Professional & DIY Advice' started by rdm2370, Nov 10, 2016.

  1. rdm2370

    rdm2370 New Member

    Nov 10, 2016
    MY shower pan is 50x45...The drain in a linear drain that is 28" Long x 2.75 Wide" with a 2" outlet...My shower is a Grohtherm 3/4 with 3 outlets I will paste the specs below.. If I turn on the shower all the way it will start to overflow, if I turn on the shower head and rain shower I will have a real question is...does anyone know the proper drain size for the amount of flow my shower produces (see specs below). It seems like the drain capacity is too small but I can't find it in writing anywhere...The contractor is saying it is a standard drain but I am having a hard time believing him...

    3/4" Thermostat Rough-In Valve

    • Compact cartridge with wax thermoelement
    • Built-in non-return valve with dirt strainer
    • Built-in service stops
    • Integrated stop valves
    • ¾“ NPT female thread
    • Back-to-back installation by reversing the cartridge
    • Temperature control only, outlets can only be used
    with separate stop valves
    • Max Flow Rate 16 gpm at 45 psi
    • Requires Twin Ell For Shower/Tub Combinations with Diverter spout (not included)
    • 34 331 – 9 gpm at 45 PSI (½" Valve)
  2. Smooky

    Smooky In the Trades

    Apr 4, 2011
    North Carolina
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