The WR-4 2-Way Foam/Rinse/2-Way Sanitize System is a combination applicator featuring the unique all-in-one SmartWand™. This venturi injection system uses standard city water pressure (35 - 125 PSI) to draw and blend chemical concentrate into the water stream to create accurately diluted solutions. Apply two different sanitizers and two foaming chemicals separately or simultaneously. The foaming solutions then flow through the discharge hose and the SmartWand™ which draws in atmospheric air to create and project wet, clinging foam on to any surface up close or at distances up to 6 feet. Simply open the appropriate ball valve and rotate the SmartWand™ to use the fan pattern spray setting to apply sanitizers or to rinse at full pressure.