In an earlier contribution to this discussion,
Dave£ wrote:

I checked the air pressure in my Britony 80 combi boiler's expansion
vessel the other day; that's after I lowered the water pressure to
about 0.8 bar. There was no air pressure at all - as I suspected.

I now need to know how many psi of air to pump into it when the water
presure is, say, about 0.8 bar. I'm asking for a psi figure because my
air pressure guage only has psi reading no bar reading.

The expension vessel was originally pre-charged to 0.7 bar according
to the manual.

Thank you

Dave L

1 bar = 14.5 psi - so, for 0.7 bar, you'll need just over 10 psi [10.15 to
be exact - but I doubt whether your pressure gauge measures fractions of a
psi]

--
Cheers,
Set Square
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