Grohe Lineare Pressure Balance Valve Trim with 2-Way Diverter with Cartridge - 29421Grohe Lineare Pressure Balance Valve Trim with 2 Way Diverter with Cartridge 29421 Dual handle pressure balance trim with integrated diverter and precise temperature control in a clean, minimalist design. Features Two handle design with separate diverter and temperature control Top handle controls 2 way diverter between outlets Bottom handle controls on off and water temperature Includes double ceramic pressure balance cartridge Ceramic disc mixing