Elkay LF2 Aqua Sentry Filter System Kit (Coolers + Fountains)Elkay LF2 Water filters provide cleaner, great tasting water for drinking fountains, water coolers and bottle fillers. All of our filters are made with activated carbon to improve taste and odor. Many also reduce contaminants such as lead. Elkay filters are easy to connect and are self contained replaceable cartridges, limiting exposure to contaminated media. Features Aqua Sentry retrofit filter kiB245: B1761unfiltered Elkay coolers and fountains