I am new into the coffee making side of things despite being an avid drinker for many years. This is largely due to being in the lucky position of inheriting a lightly used BZ10 from a friend who has just moved overseas.
In doing some reading to learn more about making coffee and about the BZ10 machine, I came across quite a few people stating that the factory OPV setting is too high at around 12 - 13 bars. These people have stated they needed to change the OPV setting down to around 9 bar instead.
Given that the high pressure setting appears to be a standard Bezzera setting for BZ10, is there some logical reasoning behind the factory fixing it at this setting? The OPV is glued down so you need to remove the glue to change it and as such I would think that Bezzera do not want you to meddle with it.
Secondly, am I correct in thinking that if you match the correct grind and tamp well, this 13 bar pressure setting shouldn't be an issue with regards to the quality of coffee made provided that it only takes 9 bar of pressure to run through the puck (Controlled by grind and tamp)? If so, given that quite a few people have felt the need to adjust their OPV, is this factory setting genuinely too high or is there another factor nobody has mentioned?
If I have made any glaring demonstration of a complete lack of understanding, I do apologise in advance.
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