KTROSYS - Provides the purest home-filtered water available. Includes two pre-filters: the first sediment pre-filter removes sediment, rust, dirt and other solid debris, the second carbon pre-filter removes chlorine, odor and protects the RO membrane which removes dissolved metals and salts, plus other harmful contaminants. A storage tank holds the RO processed high quality water until needed in which case the water will then pass through the final post-filter which removes tastes, odors, and organic chemicals.