Architecturally inspired and awe inspiring. This single-handle central thermostat trim kit is part of our minimalist Times Square Collection. Select your preferred water temperature with the lever handle and the thermostatic mixing valve (sold separately) will keep it constant. Your shower system will also require a separate On/Off Volume Control.Brass Casting: Highest quality faucet material for durability & long life.Wax Thermostatic Unit: Permits shuttle valve to move between the hot and cold seats to maintain the pre-selected constant water temperature.Back to Back Capable: Hot and cold can be reversed.Spring-Loaded Check Valves: When the hot and cold water enters the fitting, both supplies pass through the spring-loaded check valves to prevent cross flow of hot and cold water.Integrated Stop Valves: Ensure easy cleaning and servicing.Adjustable Hot Limit Safety Stop: Limits the amount of hot water allowed to mix with cold. Reduces the risk of accidental scalding. Maximum water temperature limit may be reduced to 104 or 109 degrees Fahrenheit.