Would it not be better to just pop a blank into the unused 8mm lines rather than tie them from supply direct to return side?
I would have expected that to have an effect on the downstairs part of the system, since the upstairs is effectively one loop even if all radiator valves are closed off...
Hi all.
Had the floor up for something else and spotted something on the plumbing for the central heating that I thought I would query. (only had the house 3 months)
There are 22mm supply and return lines run out under the floor from the boiler to the middle of the 1st floor landing with...