Having changed my expansion vessel, inevitably (after the inhibitor was added) something sprang a leak :(
In this case looks like the AAV which sits behind (and as part of ?) the pump.
The one I have is a metal top screwed onto a plastic base. I can't see the base.
I have unscrewed he metal bit, which has a float and valve. I'm hoping I can just put a new one in. However, it seems the one for my boiler (c.
2002) is now this one:It matches my boiler model, and I note that it replaces the previous model.
Am I OK to just change the top bit, or does the whole assembly have to come off. And oif the latter, how, given I can't get to it ?
Thanks in advance