Got a customer who's disabled and short of money and the valve has a perforated diaphragm in it. Its out of stock everywhere until next month. Problem is they can't really afford to replace the whole concealed cistern so before they do I'm trying here to see if anyone has a spare diaphragm or a...
I haven't seen anyone ask if you have your property in a hard water area.
When you have a boiler in a hard water area, that is as old as yours, its heat exchanger can become clogged with hard water deposits rather like a well used kettle 'furrs up'.
If your pump is working, you should feel it...