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Hi, thanks for replying to my post it is a drayton TRV that has a metal turning bit at top with the numbers on and a beige plastic cowling that should be attached to the metal pipe fitting / coupling that attaches to the radiator / water pipe. however the plastic / metal turning bit has...

Hi hope someone can help we have just bought a house that has a ferroli optima 901 combi boiler which works perfectly. However, one of the thermostatic radiator valves is broken and needs replacing and I need to drain the system, replace valve and refil / re pressurise system. I have...