Thanks for the feedback
The stopcock can be opened fully. Hot water symptoms are the same.
Its only a terraced house with only 1 bathroom with a bath and basin (no shower) and a kitchen sink.
Fortunately my plumber is still answering my calls and actively attempting to fix the problem...
Thanks you both for your prompt responses. That has been my worry since I discovered the problem.
I understand that when 2 taps are turned on there will be reduced pressure but I wouldn't expect there to be no flow at all. I have friends with the same model boiler, albeit an earlier...
Just had a a Greenstar 24i junior combi-boiler system replacing a conventional boiler system.
House has 3 bedrooms and 1 bathroom, with a kitchen sink (hot & cold tap), bathroom sink (hot & cold tap) and bath (hot & cold tap).
Heating is fine, however hot water pressure is poor. If...