Grohe Grohtherm SmartControl Single Function Thermostatic Valve Trim - 29140Grohe Grohtherm SmartControl Single Function Thermostatic Valve Trim 29140 Single function thermostatic shower trim with intuitive SmartControl operation and precise temperature regulation. Features Controls one shower spray source GROHE SmartControl push turn operation: Push for on off Turn for water volume adjustment GROHE TurboStat technology maintains consistent water temperature throughout the shower GROHE SafeStop override button limits maximum