Flow gauges for central heating pipe work

[doitmyself]

I fitted a 0-2 bar pressure gauge straight after the pump and another on the return near the boiler.

Have you allowed for the static height (if any) difference between two gauges as 9 psi or 6.2M seems to be a very high system loss??

It's not clear where the second gauge is located. It sounds as if it is on the return as it enters the boiler, in which case the head loss in the boiler's heat exchanger would not be included in the 9 psi.

Edit:

It would help if we knew which boiler you had,