The EC Jet is a quick coupling attachment to the end of your pressure washer designed to dilute material 4:1 (4 parts water to 1 part chemical), eliminating the need to predilute the product yourself. It is primarily used when applying NMD 80 or SOS-50 for new construction clean-up. The EC Jet allows for quick and accurate dilutions while spraying the chemical with the proper nozzle already in place. The open/close valve can also be used to shut off the chemical in-take and allow for rinsing without removing the unit. For best results, a 3 to 6 gallon per minute pressure washer is recommended.