Includes 2 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. The water will then pass through the final post-filter, which removes tastes, odors and organic chemicals. Item Summary: Replacement Cartridges, Restaurant, Reverse Osmosis, Water Filters, Beverage Dispensers