The RCI Technologies patented fuel purifier is a one-step unit that removes up to 99.8% of free water and up to 95% of other heavy contaminants that are found in diesel fuel. Even today leandiesel fuel will easily become contaminated during transportation and storage. Unlike many other products on the market, the RCI Technologies fuel purifier performs this function without the use of a replaceable, changeable, or cleanable filter element or cartridge. By removing contamination immediately before the fuel enters the engine filter system, you can keep your fuel clean, preserve fuel quality, and extend the life of your equipment. The FP 2000 is designed for larger diesel fuel pumping stations, aircraft fueling, fuel docks, and extra heavy-duty mobile, stationary and marine engines. Holds approximately 4 gallons of water and contaminants, takes approximately 25 seconds to completely drain.