While home tap water may look clean, it can contain contaminants picked up on its journey through aging home pipes. For cleaner, great-tasting water, remember to change your PUR pitcher water filters. These PUR Pitcher Replacement Filters fit in all PUR filter water pitchers and water filter dispensers. Each PUR pitcher water filter replacement provides 40 gallons of filtered water with improved taste, or 2 months of typical use. A water filtration system is important for clean water because tap water can contain potentially harmful contaminants from pipes under households. This PPF900Z PUR water filter replacement for pitcher pack is certified to reduce contaminants and substances that could be lurking in your water. These PUR Pitcher Filters are certified to reduce 2x more contaminants than Brita filters. Be cautious of 'off-brand' filters. They are not tested or certified to filter the same as PUR filters. This PUR pitcher filter replacement pack contains the only filters certified to reduce contaminants when used with PUR systems. Disclaimers: Filters faster compared with PUR Plus pitcher filter with lead reduction PPF951K; Reduces 2x more contaminants versus best-selling Brita® pitcher filter OB03. Brita® is a trademark of Brita LP; PUR does not filter microbes.