So the general consensus is that there is air in the hot water cylinder. I am not sure if there is a bleed valve so it looks like I will have to call in somebody to have a look if I can't touch it. I have attached a photo of the pipework if any help.
Hi
I wonder if anybody can enlighten me to what my problem may be.
I have recently drained the CH and filled it back up, bleeding all the radiators.
The system has an unvented cylinder with two zone valves. When the valves are fully open there is hardly any noise from the cylinder and the...