Aquasana’s Claryum® 2-Stage under sink water filter instantly transforms ordinary tap water into clean, great-tasting water for 500 gallons or up to 6 months. This system is WQA certified to reduce up to 99.99% of 78 contaminants — 15X more than the leading pitcher filter — with a .5 GPM flow rate that’s 5X faster. Aquasana's Claryum® filtration technology is tested and certified to NSF/ANSI Standards 42, 53 (includes P473), and 401, for the reduction of 99.995% of Cysts, 99.6% of microplastics and lead, 99.7% of PFAS Forever Chemicals (specifically PFOA/PFOS), 97.3% of chlorine, and 91% of chloramines. The Claryum® 2-Stage is also certified to reduce mercury, herbicides, pesticides, pharmaceuticals, and more. Our under-sink water system features two powerful filters, combining activated and catalytic carbon with ion-exchange and sub-micron filtration for premium water filtration. Claryum®'s selective filtration technology retains naturally occurring beneficial minerals found in water like calcium, potassium, and magnesium for healthier, more delicious water. These filters are intelligently designed with the environment in mind. The Claryum® 2-Stage utilizes minimal disposable plastic parts for reduced plastic waste, so that you can enjoy clean, filtered water, without adding unnecessary plastic waste into the environment. Each filter set replaces over 3,750 plastic water bottles for less than a tenth of the cost. Make a difference with this sustainable, eco-friendly solution. We make it easy to know when you need to replace your current water filter. The Claryum® 2-Stage will alert you when it's time to change your filters. Filter replacements are engineered to be quick and easy. There is no need to disconnect hoses or water lines — simply twist off and replace with a new water filter. Includes an all-metal dedicated faucet in Brushed Nickel finish. Tee: 3/8"F X 3/8"M X 1/4"M compression Filter inlet: 1/4" OD, Filter output: 1/4" OD