How can I reduce pressure in my Worcester 350 combi? My 13-year old boiler crashed and I used the manual tap to repressurise the system. No problem. Worked first time. Left the tap open slightly, whilst the system was running and now the pressure is too high and the overflow is running whenever the boiler is working. How can I depressurise the system to get it down from 3-4 bar to

Alan Leslie, December 2006

easy way if you can't locate prv just let some out one of the bleed valves on a radiator with a small container

hi-spec plumbing, December 2006

Hey, there will be a blow off valve somewhere, they usualy have a red head which is made of plastic and you turn round? Should be inside the boiler?

Dan, December 2006