Christian McArdle wrote:
my ideal isar he35 has been fine for the last 6 weeks since fitting
until this week, i noticed the pressure had dropped to 0.75 bar
from
the usual 1 bar (recomended when cold)

Thanks for all the replies they have certainly given me some ideas,
my house isnt particularly big more unusual 60' deep by 18' across, the
boiler supplies 13 radiators + 1 towel rad. I fitted the boiler myself
and was concerned at the expansion vessel section however i was assured
it 'should' be o.k. my old system had 28mm flow and return pipes
running to the old tank in the centre of the house 30' each i utilised
these when fitting the combi boiler
i intend removing them and connecting into the 22mm pipes. I think it
will be best to fit an expansion vessel at the same time, just a couple
of questions, can the vessel be fitted anywhere on the system,? can you
recomend any particular make? would i create another problem by
oversizing an expansion vessel?

Whilst i am asking, when i fitted the boiler i installed trv's
upstairs, when doing the above i will probably fit an automatic bypass,
what is the ideal location to fit one of these

thanks again