Thanks a million. Should there be anything besides the weight and the orifice? It reminds me of a lead weight pressure release valve I've seen on small industrial equipment from the 60s... and those just have the two pieces. Since I have a 3/8 safety valve already to replace the old one, I'll just pull this (also appears to be 3/8) and add a vac breaker there.IamOiman wrote: I would guestimate 90-95% of machines use 3/8" BSP for the safety valve, coincidentally the same size as most wobbler weight fittings. The wobbler weight itself is acting for two functions, the vacuum valve and a pressure controller. The vacuum valve and a modern pressurestat can certainly replace it, though some people elect to keep the wobbler weight to keep the machine's originality.
If I have the space I usually use a t-fitting to fit the safety valve and vacuum valve to one boiler fitting, this pic from my President. I use a 1/4F to 3/8M reduction fitting for the vacuum valve as it is usually 1/4", but of course other sizes exist if you can source them.
I measured it and it appears to be sorta the same 10 bolt bcd and ID/OD. I ordered one and am fairly certain it isn't quite right thou... I measured 55mm c-c and 200od/160id (as opposed to 58mm 220/168)... but we will see when it arrives. What material do you prefer when making your own? I'm confident I can fab one easily.IamOiman wrote: I am not certain on the boiler gasket but it may be compatible with a Gaggia D90/E90 boiler. I would need a better pic of the flange on both sides to confirm. If it is not a common size you can make your own gasket if needed.