Aquasana's Claryum 3-Stage under sink filter instantly transforms tap water into clean, great-tasting water for 600 gallons or up to 6 months. 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 proprietary Claryum filtration technology is tested and certified to NSF/ANSI Standards 42, 53 (P473), and 401 to reduce 99.997% of cysts, 99.6% of microplastics and lead, 99.7% of PFAS (PFOA/PFOS), 97.3% of chlorine, and 91% of chloramines. Also certified to reduce mercury, herbicides, pesticides, pharmaceuticals, and more.This system features two powerful Claryum filters that combine activated and catalytic carbon with ion-exchange and sub-micron filtration for premium, highly effective water filtration. Also includes a 5 micron Pre-Filter that improves effectiveness and extends the life of your system by capturing rust, sediment, and silt. Claryum's selective filtration technology retains naturally occurring beneficial minerals found in water like calcium, potassium, and magnesium for healthier, more delicious water.Each filter set replaces over 4,400 plastic water bottles for less than a tenth of the cost. Make a difference with this sustainable, eco-friendly solution.Smart alerts let you know when it's time to change filters - no need to disconnect hoses, just twist off and replace.Includes a premium all-metal faucet in Bushed Nickel finish.