The 3M Aqua-Pure under sink dedicated faucet replacement water filter cartridge AP-DW80/90 provides water filtration on demand for drinking (water, coffee, tea, baby formula, etc.) and for cooking through our advanced dual stage carbon-block filtration process. The AP-DW80/90 replacement water filter cartridge set allows for use on both chlorinated (municipal) and non-chlorinated (well water) systems. In many filtration applications, carbon is often the preferred media of choice to absorb certain impurities and one of the most powerful absorbents available. Carbon is highly effective due to the vast surface area contained within a small footprint. One pound of carbon contains a surface area of approximately 100 to 125 acres and can absorb an extremely wide range of substances which may be in drinking water. To maximize system performance and efficiency, regularly scheduled maintenance including replacement of the filter cartridges at the required interval, at the rated capacity, or sooner if a reduction in water flow occurs is required. Filter life is dependent on actual use and incoming water quality. 3M, a household brand name, is a known leader in filtration technology and recognized for innovation, trust and quality around the world and 3M branded water filtration products have been addressing water quality issues for over 50 years. 3M products offer a wide range of solutions designed to address many types of water quality concerns. Third-party certifications, such as NSF and WQA, are a quality advantage we strive to provide on many 3M water quality improvement solutions. Having clean and clear drinking water in your home is as pleasurable as it is reassuring to know that you're giving your family the best. With a water filtration system from 3M Purification, you can provide filtered drinking water for every member of your family. From whole home water filtration to drinking water systems, look to 3M purification to help you find the right solution.