Jim Crow's view sounded pretty authorative and I'll follow the advice but will probably fit new valves after some research.
Many thanks for the help of all posters.
I'm still not sure if my picture appeared.
Hi Pete
This gets confusing.
I can't see any arrows on the valve body but on the T-piece to which the valve is attached. There is an arrow pointing towards the rad on the union attached to the rad and on the union attached to the pipe there is an arrow pointing towards the pipe. Next to the...
Hi
I have recently replaced my CH boiler and have started using some radiators which I didn't use before. Two of the TRVs are producing vibration and juddering noise which I can temporarily stop by slightly adjusting them.
However the noise returns in about 10 minutes time. They are Danfoss...