The 2-Way A-50 Airless Foamer is a medium volume foam applicator for projecting two foaming chemicals on to any surface up close or at distances up to 8 feet without compressed air. Use the chemical ball valves to inject the two chemicals separately or simultaneously. This venturi 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 flows through the discharge hose and airless foam wand, which draws in atmospheric air to create and project wet, clinging foam.