recenly had a prv and exspansion vessel fitted to my ace high boiler but still losing pressure through blow off valve over night.got no leaks water just coming out of blow off valve

grant, January 2012

Grant, I've being off line since yesterday morning. What does the pressure gauge read in the morning after it has been venting ? Does boiler need topping up before it will work or does it work but constantly drip from prv. What was your original fault /symptons that prompted you to change the expansion vessel and the prv? Off line now whilst 1900 hrs 31/01/12

Colin West Yorkshire, January 2012

hi colin when the heating goes off we get a constant drip through the blow off valve pipe then with dripping the pressure drops slowly over night.changed prv twice and exspansion vessel.call outs are not cheap.would be grateful if you have anyideas.cheers

grant, January 2012

Hi, does pressure gauge read low pressure or are you stating loss of pressure because its venting through prv?

Colin West Yorkshire, January 2012