the worcester boiler 24i when pressured upto 1 bar- is reduced to half overnight, water is dripping from the overflow pipe- wht can be wrong. I do not have amanual for the boiler moved in to new house 18 months ago.please can you suggest problem & where might getuser manual
thank you

alison jarvis, February 2008

Yes it could be the pressure relief valve. try changing that first but it could also be that your expansion tank needs re pressurizing!! i would get someone to re pressurize the tank first up to 3/4 bar then see if prv is still leeking . dont let anyone tell you the tank needs changing ( they prob dont know how to re pressurize )!!

dai watts, February 2008

it's not an overflow.
it's a prv discharge pipe. for when to much pressure is in the system.
fit a new prv.

hi-spec plumbing & heating, February 2008

if you can see water dripping for the overflow pipe then it means your overflow valve is leaking remove and fit replacement

Nigel, February 2008