Cheers boys, the boiler is only 3 years old and serviced twice in that time. I'm not doing it myself I'm just getting the parts ready for my mate to come and do it. He's said change the PRV at the same time.
My Baxi Due-tec 40 is leaking water past the prv. My pressure is around 1 bar but goes up passed 3 when the heating is on. Is this my pressure vessel and can it be pumped back up as i see no filling point. Cheers