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So if anyone wants to do an OPV mod on their Classic, on mine one full turn of the OPV equates to about 2 bar of pressure.
The OPV on mine stubbornly refuses to turn.
Actually scrap that, I've never managed to get the hose off to undo the bolt that covers the OPV adjustment, which is hex type, right?
Howard
Coffee machine service day. Strip and de-scale, backflush, thorough clean of other components, check and set pressure.
Puly Caff: woah, that stuff attacks coffee residue pretty aggressively. Everything is sparkling like new again. Amazing!
Pressure setting for this batch of coffee. I got my pressure gauge in the post, which simply screws to the bottom of the portafilter. 8 bar was still rushing through so I dropped it right down. It was pulling too slowly at 4 bar, but the shot was noticeably richer. I’ve left it in the middle at 6 bar, so I’ll find out in the morning when if I’ve got it dialed. So if anyone wants to do an OPV mod on their Classic, on mine one full turn of the OPV equates to about 2 bar of pressure.