Patented radiator tails. Once fitted between the radiator and the valve there is no need to drain the radiator or system when removing for maintenance or decorating. Radmaster 650 Isolating Radiator Tails 15mm x 1/2" (Pair) in Chrome Brass. Using an isolator tail allows you to remove the radiator while it remains full of water. Removing the time-consuming part of the removal process as well as the risk of spillage. Chrome plated brass construction for durability and an aesthetically pleasing appearance. Tested and conforms to BS2767. Exclusively available from ePlumb Shop. Manufacturer: Hasvit