The second one is correct, first doesn’t know what he’s doing unless it’s an internal air gap cylinder, as it looks like a gledhill unvented cylinder second one is still correct
Thank you all for your replies, your help is much appreciated, the cylinder is in a flat, and it is on the cold supply, but after looking at the diagram below it looks like the expansion vessel should be on the cold supply going to the...
I have recently started a new job as a Facilities Manager, and one of the plumbing contractors said that he noticed an issue while he was working on a cylinder in a flat “the expansion vessel is being fed by the cold-water pipework...