Each Gardner Denver 20K Foot Operated Control Gun features a Safety Guard, and increased foot pedal area to both minimize fatigue and ensure positive valve operation. All are mounted on a heavy duty base with a solid foot guard. Each of the “FG” Series Footguns uses the “quick change” cartridge type valve. The valve assembly can be replaced in less than a minute. The 20K footguns feature 9/16" MP inlet and outlet ports. In an increasing world of automation in water blasting the air operated foot control is a reliable option for pneumatic driven water blasting applications. The air controlled foot valves are driven by industry leading Parker actuation.