PULSE ShowerSpas 3001-RIV-PB-BN Tru-Temp Mixing, 1/2" Pressure Balance Rough-in Valve Trim Kit, Round, Brushed-Nickel Easily replaces your existing valve in minutes High-quality brass valve-body ensure long-life Pressure-balancing valve-cartridge assures constant temperature when hot/cold water pressure changes (eg. when flushing a toilet) Adjustable Hot Limit Safety Stop greatly reduces any risk of accidental scalding Convenient plaster-guard serves as a mounting guide for installation