Hi there i am newbie to the gaggia deluxe and i am trying to learn everything to improve my espresso. So my question is about the OVP valve:

Is the number 27 the OPV valve?
How do i adjust it, i should put blind basket and then run the pump. Over the OPV pipe i should meter how much water did came out in 1 min(is the amount of water on the ulka diagram about the water that was through the OPV?).
I also want to add PID to my gaggia does some one did this?
Is the number 27 the OPV valve?
How do i adjust it, i should put blind basket and then run the pump. Over the OPV pipe i should meter how much water did came out in 1 min(is the amount of water on the ulka diagram about the water that was through the OPV?).
I also want to add PID to my gaggia does some one did this?


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