Hello. I have just replaced a velve by the hot water tank (open vent system, indirect) and - now my problems starts :(
What happen is, that when I have put everything back together there was no water in the taps (only very little and only in one tap at the same time). I though it might be an airlock so I tried this sollution
What happened next: because the amount of water in the pipes slowly builds when all taps are closed.(a build up of pressure) which is released when something is opened, at this time everything appears normal, and it lasts, for 1-2 minutes... then it all comes back to the beginning (well not really, is a bit better, at least I can wash my hands in 1floor bathroom). In the kitchen water pressure is "jumping" from very good to zero to very good again in 2/3minutes intervals.
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