sound silly but
Sealed boiler with loop topup does this loop also serve to fill the system when drained I can't see any other way to fill it? do I have to vent each rad as a friend said in the airing cupboard upstairs is an air bleed valve on a tee off one of the 22mm the pipes. Will this vent all the air out of the system without having to go around each rad?

Robert, July 2007

>does this loop also serve to fill the system when drained

yes.

>do I have to vent each rad

yes


>Will this vent all the air out of the system without having to go around each rad?

no



and disconnect filling loop when system filled.
as required by water regs.

hi-spec plumbing, July 2007