Hi,
I have an Alpha 280P combie boiler.I got a service in June last year and the guy had put in this great big red drum thing as he said it needed a pressure valve but he couldn't get one,I still had problems and 6 months ago I got a friend (engineer for boats) to sort my boiler he put in a new pressure valve, which I found myself by phoning around and everything has been fine no problem apart from recently when I run the hot kitchen tap the water takes ages to come from front of house to back when it heats up it is little more than a trickle, I tried opening the screw a little bit under the sink but no difference, any suggestions what the problem is.
thank you
vi.