Thanks for your almost immediate response,
Would you expect an air lock in the boiler or elsewhere.
I have two drain off points, one just above the bolier on the 22mm return pipe and a lower level one on the ground flor rad feed pipes.
I know this is basics but can someone run throught...
Hi,
I have an old system fitting in a 3 bed house comprising of;
4 downstairs rads,
4 upstairs rads,
indirect hot water cylinder in the 1st floor bathroom together with cold water storage mounted above,
CH F&E tank located at ground level in loft.
CH Pump located under floor boards of...