New, Improved Filter for Whirlpool® Side-by-Side Refrigerators with Easy Access Through the Front Base Grille * Reduces Bad Taste, Odor, Lime Scale Buildup, Chlorine, Dirt, Rust, Mercury, Lead * Also Reduces Atrazine, Benzene, P-dichlorobenzene, Toxaphene, Asbestos, Cysts, and Turbidity * NSF® Certified. * Also a plus, filter does not remove fluoride. * Filters should be changed every 6 months.