Thank you for all the help so far and excuse me for disappearing for a while, as i wasn't where the machine is. I kept thinking a lot about it however.... Dan, seemingly you have identified the right spot for the OPV. I got a mail from someone pointing me to this website that talks about a pressure ...

Thank you for your comments and suggestions and excuse when trespassing site policies -- maybe you might add the above p.s.-post to the FAQ file to make the point clearer. Wookie, unfortunately you didn't leave the exact link. Following the link brings me to a page that doesn't seem to offer much. B...

Thank you Dan for the pics and the diagram. As to the pic, i cannot find such a device on my machine. The diagram is pretty helpful though as I can locate the spot where the OPV should be. What i find there is a three way connection between the boiler, the pump, and the drip tray

Hi everybody, after suspecting it and wondering for a long time, I got a pressure gauge to test the brew pressure of my machine (Rancilio Epoca) and found out that it is indeed way too high at 12.5 bar. So the logical next step is to bring it down to between 8.2 - 9 bar....