by Oliver_murphy »
Thu Feb 28, 2008 12:34 pm
you will need to drain both the systems down. The cyl and Central heating. The gate valves wont cause you any hassle, as long as you have fully drained the system.
It shouldn't be draining into a overflow, I think that maybe you have the ballcock set to high,
I would suggest getting someone in, looking to pay somehwhere bewtween £300-£500 + VAT.
Given all the problems, and qeustions, its a big job to take on,