Grohe 35015001 - Grohsafe Universal Pressure Balance Rough-In Valve (New Version of Grohe 35015000) 1/2" universal inlets, 1/2" universal outlets Includes Blue Core cartridge 265 comfort range Handle limit stop, Check valves Includes plug for 3-port installation Includes metal support bracket Universal connection is 1/2" male threads by copper sweat Service stops Optional extension kit (47 996 000) available Max flow rate (top port) 3.7 gpm at 45 psi (14 l/min), (bottom port) 4.0 gpm at 45 psi (15 l/min)