KOHLER K-528-K1-NA DTV+ Digital Two-Port Thermostatic Valve Designed to work with a DTV+ digital system either individually or with a second digital valve (two, three, or six-port valve) Up to 13 gpm (gallons per minute) maximum flow rate with maximum flow of 8.0 gpm from one outlet 1/2-inch hot/cold supply inlets Two independently controllable 1/2-inch outlets Requires K-99695 DTV+ system controller module (sold separately)