dabcan Senior Member Joined: 14 Feb 2014 Posts: 10 Location: Wakefield Expertise: I love coffee
Posted Tue Mar 4, 2014, 6:49pm Subject: OPV valve replacement?
So I had a problem before with low brew pressure. I varied the grind without much improvement in pressure, then I noticed that when running the machine with NO port filter attached, there was a lot of water getting sent back to the tank. This site helped me deduce the OPV was the culprit. I took the machine apart, took the opv apart and cleaned as best I could with pipe cleaners, put it all back together and I had beautiful espressos for a few weeks. Then the pressure started to be random, sometimes up to 10, others only 6. This has declined now and it is almost consistently 4.
Regardless of how fine I make the grind I get basically the same extraction weight and time, and the pressure never goes above 4-5, and a lot of water is sent back into the reservoir.
So I would assume the OPV is the culprit and I should just buy a new one?
Any Eastern Canadian sellers for an OPV? I haven't had much luck with Zcafe so I would rather deal with someone else.
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