Sorry for the delay I've been at work. I've attached some pictures. There's the radiator without a valve showing the thread and then the radiator with the old valve that does fit still attached. The one in my hand doesn't fit.
Hi All,
I have recently moved into a new house and noticed that three out of four radiators upstairs are missing the Thermostatic Valve head. I recently bought some replacements however when trying to fit them realised they won't screw on to the current pipework as the thread seems to be...