Hi,
I want to put a new radiator and move an existing one on the top floor of the house ( 3 stories). Rather than draining the whole central heating system I thought I could partly drain it to just beow this level - using the vents on the two other radiators at this level to draw in air- but still draining with hose attached to a drain valve on the ground floor . Will there be any problems refilling it? i.e will re-opening the vents on the top floor ensure it is refilled - or will I cause an air lock by only partly draining it?
Also is it still OK to use the push fit plastic isolating valves in central heating systems - I have noticed that all the recent ones stocked in shops seem to say not for use in central heating systems - yet ones I have used before did not!
thanks
Nick
I want to put a new radiator and move an existing one on the top floor of the house ( 3 stories). Rather than draining the whole central heating system I thought I could partly drain it to just beow this level - using the vents on the two other radiators at this level to draw in air- but still draining with hose attached to a drain valve on the ground floor . Will there be any problems refilling it? i.e will re-opening the vents on the top floor ensure it is refilled - or will I cause an air lock by only partly draining it?
Also is it still OK to use the push fit plastic isolating valves in central heating systems - I have noticed that all the recent ones stocked in shops seem to say not for use in central heating systems - yet ones I have used before did not!
thanks
Nick