Perfect for all your RV family adventures, the Camco Evo Premium Water Filter is designed for exterior use to filter all water coming into your RV and reduces bad taste, odors, sediments, bacteria, chlorine and more! The filtration process beings with water traveling through a porous shell, which has openings no greater than 5 microns in diameter. From there, the now-filtered water passes through a bed of KDFR (Kinetic Degradation Fluxion Redox) and GAC (Granulated Activated Carbon) for further filtration and bacteria control. What were left with is fresh, clean, great-tasting drinking water straight from the tap. 1 replaceable premium spun polypropylene filter cartridge | Camco Evo Premium RV Water Filter