Hi - I'm not sure what these things in the picture are called, but water flows to each room when the "float" moves down, but one is stuck.
Last year a heating engineer came and unstuck the valve by tapping on it with his screwdriver head.
I've tried that, but no luck - three of the floats move down but one doesn't. I've tried screwing them to different heights, but no effect.
He said that they can easily be replaced - but I have no idea how - or even what they are called.
Any help or suggestions would be gratefully received.
Last year a heating engineer came and unstuck the valve by tapping on it with his screwdriver head.
I've tried that, but no luck - three of the floats move down but one doesn't. I've tried screwing them to different heights, but no effect.
He said that they can easily be replaced - but I have no idea how - or even what they are called.
Any help or suggestions would be gratefully received.
