Hi guys, long time reader first time poster...
I have VBM domobar which as been running like a dream since new. From new the brew pressure max's out at 12 bar.
After reading some threads on this site about adjusting the OPV to reduce the brew pressure to 9 bar (10 bar on the gauge) I decided to give it a go and managed to do it with no real hassle. My coffee shots taste soo much better also!
The only issue I have is I get this high pitched ringing noise from the water pump when I max out at 10 bar.
I readjusted the OPV and realised the high pitched sound picks up when I set the OPV anywhere from 8 - 10 bar max. If it sits lower or higher on the gauge the sound goes away.
I even tired replacing the water pump and OPV with no success...
Will this affect the machine in the long run? If so, what could be the issue??
Cheers in advance!!
I have VBM domobar which as been running like a dream since new. From new the brew pressure max's out at 12 bar.
After reading some threads on this site about adjusting the OPV to reduce the brew pressure to 9 bar (10 bar on the gauge) I decided to give it a go and managed to do it with no real hassle. My coffee shots taste soo much better also!
The only issue I have is I get this high pitched ringing noise from the water pump when I max out at 10 bar.
I readjusted the OPV and realised the high pitched sound picks up when I set the OPV anywhere from 8 - 10 bar max. If it sits lower or higher on the gauge the sound goes away.
I even tired replacing the water pump and OPV with no success...
Will this affect the machine in the long run? If so, what could be the issue??
Cheers in advance!!

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