The WR-1 Foam/Rinse System is a combination medium volume airless foam/rinse 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 an accurately diluted solution. The solution then flows 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 rinse valve and rotate the SmartWand to the rinse position for a full pressure rinse.