Downstreaming and rinsing - issues with valve not pulling straight water?

Will that fit a HP 4040 pump

High operating temperature: to 165 F 3600 PSI maximum 2.4 to 10.8 GPM flow range 3/8" FPT inlet 1/2" FPT discharge and bypass

You’ll need either 1/2 inch hose or 1/2” to 3/8” fittings.

What is designed at the local Landa shop

The box for the 3 way valve.

Ok kool yea I love the little box the 3 way valve fits inside it perfectly

I use the Schertz box and have no plans on doing this. But I am curious about this and am hoping to understand better. Aside from possibly damaging the ball valve as that’s not how it’s intended to be used, how would restricting the flow with the ball valve be any harder on the unloader than forcing the water out of an even smaller hole using the pressure tip?