Thermostatic Mixer Valve allows for a user set temperature that will remain constant regardless of any change in water pressure. Anti-Scalding Device shower valves are pre-set at a safe temperature of 38C, which is especially useful for children or the elderly who generally have thinner skin. Shower Valve Options 1 Outlet - 2 Round Handles 2 Outlets - 2 Round Handles 2 Outlets - 3 Round Handles Shower Valves Detail 1 Outlet - 2 Round Handles Top dial - controls water to 1 outlet diverter Bottom dial - temperature control Inlet Connection Size: 3/4" Outlet Connection Size: 1/2" High Quality Design Chrome Finish Thermostatically controlled Manufactured from highly durable brass Operating range 20 - 50°C with 38°C safety button Built in non return valves to prevent back.