Many Thanks, Agile.
i have found the loop and the valves!
i only had to rip a hole in some boarding near the boiler and search around in the dark for a couple of hours until i found the flexible hose and the valve taps at both ends.
your help appreciated still
help. i have a vaillant vcw 18 sine t3w combi boiler.
The water pressure has fallen to almost 0. I need to refill.
I cannot find the cold water refill valve!!! i have searched the manual (a useless diagram), and I have checked this site FAQs and stickies. I am none the wiser.
Please...