The iSpring CW31 RV Water Filtration System is the most straightforward way to fulfill your home water demands. It has a three-stage filtering process. 2.5x10inch filter cartridges are housed in a 10-inch filter housing. The first stage is a sediment filter that eliminates particles bigger than 5 microns in size, and the second and the third stage is a CTO carbon block filter that removes disagreeable tastes, odors, and chlorine. And provides water with a highly refreshing sight and flavor. This system requires an operating pressure of 45-70 psi.