The thermostatic mixer valve gives you complete temperature control with a built-in anti-scalding device, so you'll never have to worry about a drop in temperature again. Thermostatic Valve Top dial - Controls water to outlet (shower head) Middle dial - Controls temperature Bottom dial - Controls water to outlet (Handset) Pre-set maximum temperature Built in anti scald device set to 38 Operating range 20-50°C, with 38°C safety button Chosen temperature maintained to within +/-1°C Minimum 0.5 bar water pressure Inlet Connection Size: 3/4" Outlet Connection Size: 3/4" Automatic shut off in event of water cold supply failure Product Specifications Style: Modern Material: Brass Finish: Matt black Shape: Square, Slim Minimum Pressure: 0.5 Maximum Pressure:7.0 Inlet Connection Size: 3/4" Outlet Connection Size: 3/4" Shower head: 250 mm Suitable Water Systems: Combination boiler systems Gravity fed systems (only with a pump) Megaflow system Pumped hot water systems Un-vented hot water