How To Replace Pressure Relief Valve on Combi Boiler?

you can turn of the flow and return pipes on the boiler, the two on the out side edges of the boiler under neath, turn the rad cap on te PRV till the water stops running then you can take the valve out, some unscrew some are held in with a grum screw. Once you have fitted the new one ceck the persurin te red expansion vessel on the back ou the boiler wit a tyr gage should be about 1.5 bar if not refill with a bike pump. turn on te valves and refil as normal

erj
January 2010