Heavyweight brass 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 40oc. 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. Supplied with decorator cap and one wheel head. Features: Heavyweight brass 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 40oc 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 Supplied with decorator cap and one wheel head Specifications: Dimensions: H:130.0 x W:70.0 x D:40.0 cm Colour: Grey Guarantee:2 Years Material: Brass Model Number: 5