The BE 85.400.000 is a versatile downstream injector that allows you to introduce cleaning solutions into your pressure washer stream after the pump. This "downstream" placement is crucial because it prevents harsh chemicals from passing through your pump's internal seals, significantly extending the life of your machine. The injector features an adjustable metering valve, allowing you to fine-tune the soap-to-water ratio (typically from 10% to 20% dilution). This kit comes ready to install with 3/8" quick-connect fittings and a clear suction hose with an integrated filter to prevent debris from entering the system.