pressure release valve leaking

[newdiy]

good evening all,

my boiler is potterton . the release valve with red cap (above the gauge) on expansion vessel is leaking water. I have now released the pressure to zero and it is still dropping water.

what is wrong with it and what can I do?

thank you very much in advance for your help

 

[Madrab]

If it's lifted at some time and won't seal back down then it needs replaced. What model of Potterton is it? You may need the EV looked at too.

Time for a proper service methinks.

 

[newdiy]

good morning Rob.

mine is suprima. the vessel is 8l in red colour and is fitted next to boiler.

What sort of services should I look for ?

 

[Madrab]

OK, so the PRV is below the red expansion vessel (EV) beside the boiler? You'll need to depressurise the system, loosen the pipe into the vessel catch all the water coming out and then replace the PRV with one that's rated the same. Then whilst all that is off, check and set the pre-charge pressure on the EV to what the system requires.

If any of that has gone over your head then I'd advise you get a pro in to sort it out for you.