u/Bryanrisko

Hey fellas, I have recently installed a ZK1 flow unloader and replaced my original factory trapped pressure unloader. I did not change any other variables in my setup, same nozzle sizes and 200' 3/8" hose. And I'm running 4200 psi 8gpm pump.

My psi has since gone down considerably I think around 2300 psi or 2600 psi (I forget what I measured).
I have the unloader screw all the way open (max psi) and I'm not getting anywhere near 4000 psi (obviously pressure loss with 200' will happen).

Any help or advice on this lack of psi is appreciated. FYI it's brand new.

Thanks fellas!