The Portable Uni-Body DEMO Foamer is a combination foam / spray applicator for demonstrating foaming or non-foaming chemicals being applied to any surface. Featuring an all stainless steel cart assembly, 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. Use the foam wand and nozzle for rich, clinging foam created by injecting compressed air into the solution to greatly increase volume and coverage ability. The foam is then projected through the discharge hose and fan nozzle at distances up to 12 feet. Use the airless foam wand to demonstrate wet, clinging foam without compressed air or use the spray nozzle to apply chemicals as a fan pattern spray.