Hi Tony, it looks like a flat rubber washer to me, although it could be a flattened O ring. Its not a tapered thread. Not sure a new PRV will come with a seal?
I have seen a PRV for my boiler, but in the picture it is without the lower washer. I suppose the best way would be to attack it and...
H chaps.
Just bought my first house(terrible 1 bed terrace) and it has a Jaguar 24 KTVJ combi-boiler. Not used it yet because don't have much spare money for gas, but noticed this week that there is a small puddle under the unit...
I've taken the cover off and had a look inside and have seen...