Each Gardner DenverWater Jetting Systems 20K Foot Operated Control Gun features a fully enclosed Safety Guard, and increased foot pedal area to both minimize fatique 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.