Going to be getting a cold fill only WM and need to cap off the hot feed. This is probably a really stupid question but I cannot turn off the valves to the hot or cold feed. Both the levers are open but will not budge when I try to turn them off. They both have an arrow pointing to a screw where the 'handle' is joined to the valve but will not budge even if I unscrew this. I have tried with pliers after removing the handle (not too hard) with no joy. they dont feel stuck, more like I am missing how to do it!
I can turn off the water while I switch over so not a big deal but I would like to turn the hot feed off rather than just capping it - is this essential?
Thanks for your help.