The Model 20 SS Bypass Airless Foamer/Sprayer is a high pressure wash/rinse system for quickly applying a foaming chemical and rinsing through the same hose. Using a 3 - 6 GPM pressure washer, this stainless steel venturi injection system draws and blends chemical concentrate into the water stream to create an accurately diluted solution. The solution is then projected through the discharge hose to the foam wand where it draws in atmospheric air to create a wet, clinging foam. Use the spray nozzle to apply non-foaming chemicals and simply open the bypass ball valve to rinse at full volume and pressure.