Thermostatic and Manual Radiator Valves These radiator vales are manufactured to high standards; from the high-quality brass down to the stunning and trendy black finish, choose from one of our stylish range of valves to suit your set-up. Thermostatic Valves are generally used to regulate the flow of fluid to radiators on a central heating system. A regulating element controls the opening of the valve to keep the ambient temperature of the room at a pre-set value, this reduces unwanted changes in the temperature and saves you money on energy. BLACK Angled Manual Radiator Valves (Pair) This trendy pack of radiator valves allows you to turn your radiators on and off. This pack includes 1 pair of valves in a stunning smooth black finish. The perfect finishing touch to any .