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Cheers, 45yearsagasman I bought a new foot pump, so I had some faith in the pressure gauge, I followed the instruction you gave. The expansion bottle did take some pressurising, I thought is wasn’t going to show on the foot pump gauge, but did eventfully, re seated the PRV, tested to see if...

THE RV is passing on my combi boiler, This has been installed for 5 years. & this is not the first time this has happened, the pressure is at 3 bar, therefore the RV is lifting. I believe this to be attributed to the expansion bottle losing its set pressure, red bottle at the back of the wall...