I've managed to take apart most of the head, just leaving the valve sticking through. If I try and turn this with a pair of pliers - it barely moves, maybe an eighth of a turn in total.
Ok, checked the expansion tank and there is water in there. I pulled the black screw out and then turned it each way a few times. It turned fairly easily.
I've just noticed though, that one of the pipes coming from the 3-way valve is cold after the 90 degree bend - the one going to the...
This is a picture of the piping around the pump:-
The pump is this one - a BG Multihead II
I can undo the big black screw in the middle, but it doesn't seem to come all the way out. Not sure what to do to try and free it up.
Ok, it seems to be running - if I turn the dial between i and iii then you can hear it get louder, and it sounds like water is running through. Is there a proper check I can do?
A bit of additional info. I've left the whole system switched on for the last hour or so, and the boiler fired up...
Hi all - my first post on here.
We've just developed a bit of a major problem with out heating system.
It's a conventional system consisting of boiler, rads, hot water tank and header tank in the loft.
We've always had a minor issue with the 3-way valve not functioning properly - you have...