yes I'm pretty sure I've covered any isolation valves and I'm on the theory of air lock. Any ideas of how to get rid of an air lock. I have comically sucked on the taps and get some water out. Any suggestions? Thanks for the reply btw.
Just bought a house. The system had been drained.
Removed all stickers from stop taps warning me to call a plumber etc and turned them on. Life breathed into the system and all the cold water taps came on. I quickly ran around happily turning them off.
There is not CH but there is an...