The Drum Bung Mount Uni-Body™ A-25 Airless Foamer has threads to fit most bung openings, and is a medium volume foam generator that mixes chemical with water and projects a wet, foamy solution on to any surface up close or at distances up to 6 feet. This venturi injection system uses standard city water pressure (35 - 125 PSI) to draw chemical concentrate directly from the drum into the water stream. Precision metering tips control chemical volume to create an accurately diluted solution that is projected through the discharge hose and the "airless" foam wand, which draws in atmospheric air to create wet, clinging foam, without compressed air.