Hi, can anyone help? Yesterday I tried fixing a leaky hot water tap in the bathroom of my purpose-built split-level 1960's maisonette (part of larger block). As far as I can tell, there's a single cold water mains valve in the kitchen that feeds the system consisting of a cold water storage tank upstairs (in my neighbours' loft to which I do not have direct access), all the taps and an immersion tank downstairs (which is electric, as I do not have a gas boiler).
So having done some reading on the web, I decided to turn the immersion tank off, shut down the water main, run all the taps and drain the system down in order to fix the tap. (for some reason the cold water upstairs and the hot water tap in the kitchen downstairs continued running at a sort of 1/5th of what I would call "normal' pressure, ie. not exactly "dripping" but "running" even though the mains water was shut down!) Mystified, I proceeded to service the hot water tap upstairs which luckily was dry.
Having fixed everything, I turned the mains water back on. After a while cold water started running upstairs as expected, but all hot water taps continued to be dry. I left them open, thinking maybe there's trapped air that needs to be released etc... Nothing happened. Normally water runs from these taps (regardless of whether the cylinder is heating water or not), but now I have no water coming out at all. Am I missing a trick here? Is the hot water cylinder supposed to be re-filled in some particular way? Any help greatly appreciated.