Why would anybody need this?
I have a cheap ball valve before the gun that does the same thing. This thing is designed with pressure gages so you don't etch concrete.
https://pressurewasher.net/collections/surface-cleaners/products/surface-cleaner-gauge-kit
These new guys will buy into anything! Do you emember the guy who used to post here as an expert who claimed that concrete can be cleaned just as well soft washing?
Brett Thompson
Blue Ridge Exterior Cleaning
BlueRidgeExteriorCleaning.com
434-466-1324 540-949-6277
brett@BlueRidgeExteriorCleaning.com