The K5 is our most advanced reverse osmosis system ever. Certified to remove more contaminants than any other system, it can produce more than 40 gallons of water a day—nearly three times the industry average. And thanks to FlexFiltration, its multistage filtering system is fully customizable and expandable to fit your water’s specific filtration needs should they ever change. The K5 is protected by a 10-year warranty on all parts. Click the following link to learn more about Kinetico Drinking Water Systems.