How to turn up psi on shurflo pump

[dvldoc]

If your pump speed is set at say 45 psi how do you turn it up. I want to go to a even smaller pulley but I need a little bit more volume because I want to go back to a single hidden nozzle.

 

[Red Regal T]

There is a small allen bolt by the relay. Turn it clockwise to increase pressure. You could try a half turn at a time till you get desired results.

 

[dvldoc]

Thanks, I'll give it a try.