Group head water flow speed without screens

[highstrings]

Since I received my V2 in March I haven't turned on my V1 (with dual gauge) in quite a while. I am now trying to sell it and am getting it all set and spec'd up for the new owner.....whoever that may be.

I have a softener system hooked up to a pressure regulator (25 psi when drawing water) and then a 1/8" line to the S1 V1. When I activated the brew button water started coming out very fast, much faster than my V2. I put in a backflush disk in the p/f and calibrated to 12.5, adjusted opv, then backed it down to 8.75 bar.

Could someone let me know what the rate of flow from the brewhead should be (without preinfusion, of course).

Thanks -
Darren