The A-40SS Airless Foamer is a medium volume foam applicator for projecting foaming chemicals on to any surface up close or at distances up to 10 feet without compressed air. This venturi injection system uses boosted water pressure (125 - 350 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 trigger gun to the "airless" foam wand which draws in atmospheric air to create and project wet, clinging foam.