Duel Fuel Radiator Valves For Central Heating - Round, Chrome: A pair of all-in-one dual fuel round head chrome valves with built in t-pieces. Converting your towel rail for electric use? Simply connect the dual fuel angled valves to your radiator and fit your electric element of choice. Once the rail is sealed, simply open the valves to allow the flow into the rail. Close the valves when using the element. All valves are backed with a 2 year no quibble guarantee.