About this item Culligan ZeroWater Filter Replacement Pack: Each filter has an estimated 15 Gallon Filter Life, but filter life can vary depending on water quality. For best results, change your filter when the TDS meter reads 006. Advanced Filtration: Our 5-Stage Ion Exchange Replacement Filter removes virtually all dissolved solids (TDS) for the purest tasting water; Total Dissolved Solids are organic and inorganic materials, such as metals, minerals, salts, and ions dissolved in water. IAPMO Certified & BPA-Free: Our 5-Stage filter is IAPMO Certified to reduce PFOA/PFOS, lead, chromium, and mercury. All Culligan ZeroWater products are made from BPA-Free plastic. This Pack Includes: 2 x Culligan ZeroWater 5-Stage Replacement Filters with Ion Exchange Technology. Compatible with Culligan ZeroWater Filter Systems. Less Plastic, More Hydration: You can save up to 110 single-use plastic bottles per filter or up to 660 bottles a year while enjoying the purest tasting water with your Culligan Zero Water Filter System. › See more product details