Thermostatic Concealed Valve Features - Top dial - controls water to 2 outlet diverter - Middle dial - temperature control - Bottom dial - controls water to 1 outlet diverter - High-Quality Design - Matt Black Finish - Thermostatically controlled - Manufactured from highly durable brass - Operating range 20 - 50 deg C with 38 deg C safety button - Built-in non-return valves to prevent backflow and filters to protect the thermostatic mechanism - Chosen temperature maintained to within +/-1ºC - Pre-set maximum temperature - Automatic shut off in event of water cold supply failure - UK standard size fitting Technical Information Suitable for the following water systems: - Combination .