This is how to adjust an unloader valve on a pressure washer. This particular pressure washer is 3000 PSI at 5 GPM.

Also I was too lazy to edit the video when I said "carburetor" instead of "exhaust chamber". So enjoy the blooper

Here is a link to the pressure gauge
https://washmart.com/products/pressur...

Here is a link to the VRT3 Unloader Valve
https://washmart.com/products/vrt3b...

These products are carried at Washmart.com