For diesel owners who take their fuel system seriously, this FASS Extreme Water Separator is some serious protection for your engine. Rated at 2 microns absolute, this thing filters out contaminants at a level that'll keep your fuel system running clean and efficient. The really innovative feature is how it handles water - it removes over 99% of water from diesel fuel, which is crucial since water in your fuel can cause all sorts of expensive problems from corrosion to injector damage. Unlike older designs that had drains, this updated version actually traps the water within the filter element itself, eliminating the need for manual draining. The extended length design provides more filtering surface area for longer service life. Important note: this XWS-3002XL MUST be used in conjunction with the PF-3001XL filter - they're designed as a system, with the water separator on the pressure side and the other filter on the suction side of your pump. This represents an upgrade from the older FF-3003/FF-3010 or FS-1001/FS-1020 filters, so if you're replacing an older system, you'll need to update both components. The construction is typical FASS quality - built to handle the demands of serious diesel applications. Whether you're running a heavy-duty truck, agricultural equipment, or marine diesel, protecting your fuel system from water contamination is critical for longevity and performance. This water separator delivers professional-grade protection that can save you from costly repairs down the road. Your injectors and fuel pump will thank you for the clean, dry fuel this system provides.