The 2-Way Acid Airless Foam/Rinse System is a combination foam/rinse applicator for applying 2 highly corrosive chemicals, such as those used to remove concrete and for aluminum brightening, and rinsing through 2 separate hoses without compressed air. This acid-resistant venturi injection system uses standard city water pressure (35 - 125 PSI) to draw and blend a high concentration of acid into the water stream to create a strong solution. The solution then flows through the discharge hose to the "airless" foam wand which draws in atmospheric air to create and project wet, clinging foam on to any surface. Use ball valves to inject the 2 chemicals separately or simultaneously. Rinse at full pressure through the dedicated hose and unique, powerful 4-hole nozzle.