How to adjust OPV on Vibiemme Domobar

Equipment doesn't work? Troubleshooting? If you're handy, members can help.

#1: Post by eduardofcgo »

I recently purchased a used Vibiemme Domobar and I wanted to adjust the OPV to 6bars. I cant seem to find a knob or a screw anywhere near the OPV. How can this be adjusted? I will attach some photos.
Thanks for the help!

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#2: Post by stefano65 »

Remove the silicone hose, the barb end is the adjustment
screwing in will increase resistance therefor harder for the water to get push OUT from the return and more water to the GH
and viceversa
Stefano Cremonesi
Stefano's Espresso Care
Repairs & sales from Oregon.

eduardofcgo (original poster)

#3: Post by eduardofcgo (original poster) »

Thanks Stefano!
With a few tries I was able to get 7bars pump pressure. Lets hope it will be around 6 at the group. Curious to compare the taste to the tradicional 9bar.