"Michael Chare" wrote in message
...

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?
I'm coming to the conclusion that it might be time to get a heating engineer
in - having owned combi's for the last 10 years i'm rusty on everything
else.

AJ