In article ,
Anthony James wrote:
Having looked looked up that particularly boiler I concede he
cant/should not have a gravity sytem.

At which point I become confused again. I do have a cold water tank in
the loft - i was under the impression this was a sign of a gravity fed
system?

Think a gravity system is where the hot water circuit isn't pumped. If
you've got motorised valves etc, it probably is.

--
*When everything's coming your way, you're in the wrong lane *

Dave Plowman London SW 12
RIP Acorn