Thermostatic Radiator Valve
Thermostatic Radiator Valves can be purchased individually, if you are looking to fit to an previously installed radiator, or they can be purchased as a TRV Combi Pack, which contains the TRV and Lockshield Valve (to close off the other end of the radiator). TRV Combi Packs are ideal if you are installing / replacing radiators in your home. Thermostatic Radiators Valves are also available for the more design conscious, offering all chrome models that will blend in wonderfully with any décor.
It is also necessary that you choose the correct size TRV, which is dependent on the size of the pipe work on your radiators, generally 8mm, 10mm or 15mm. Some TRV packs include adaptor sizes to fit all, or they are individually sold in the one size.