Heavyweight brass, traditional, period style, Thermostatic Radiator Valve (TRV) and Lockshield set. Valve to Radiator: ½" BSP Coupler. Valve to Pipe: 15mm Compression. Max Operating Pressure 10 bar. Max Operating Temp 110oc. Cartridges can be swapped from each body to change the flow and return side, as these valves are non bi directional, you can also use a bypass valve to stop any potential radiator hammer. Smooth, rough textured, pewter grey finish.
