will i am Plumbing & Heating went to a house in Wapping to replace an ERV and alter pipe work to the expansion vessel.
Removed the Tee on hot water pipe and replaced with elbow which cancelled out the expansion vessel on the hot water pipe.
We then cut into the cold mains after the pressure reducing valve and then run new pipe work to the existing expansion vessel.
Removed existing ERV and replaced with new, turned cold water mains on back to the cylinder and tested all new pipe work and connections.
Fixed my unvented cylinder. Did a good job and would use again.