The OptimH2O~ Reverse Osmosis + Claryum~ combines premium filtration technology and reverse osmosis for optimum healthy and hydration. This system is tested and certified to NSF/ANSI Standards 42, 53 (includes P473), 58, and 401 to effectively reduce 88 contaminants, including 95% of fluoride. It~s also certified to remove 95% of mercury, 97% of chlorine and arsenic, and 99% of lead and asbestos while maintaining the benefits of healthy minerals other reverse osmosis systems remove. In all, the OptimH2O~ Reverse Osmosis + Claryum~ removes 5 times more contaminants than other RO systems. The OptimH2O~ Reverse Osmosis + Claryum~ features a multi-step filtration process to ensure maximum contaminant removal. Activated carbon filters out organic chemicals like herbicides, pesticides, VOCs, and MTBE. The system~s Reverse Osmosis Membrane is scientifically designed to filter dissolved solids smaller than 1 micron, and tackles 14 impurities including fluoride, arsenic nitrates, nitrites, and radium. The Claryum~ filter block uses activated and catalytic carbon to filter organic chemicals and chlorine. Ion-exchange and sub-micron filtration tackle heavy metals and selective filtration retains healthy minerals. Finally, the Remineralizer adds back the ideal amount of calcium, magnesium, and potassium lost in the reverse osmosis process, and improves pH balance and water alkalinity for healthy, great-tasting water. With the combined power of reverse osmosis, selective Claryum~ filtration, and remineralization, you have immediate access to clean, healthy water for drinking, cooking, washing your vegetables, and more. Filter replacements are engineered for the easiest replacement. No need to disconnect hoses or water lines - simply twist off and replace. The included all-metal dedicated faucet comes in three finishes ~ Brushed Nickel, Chrome, and Oil Rubbed Bronze ~ so you can match your kitchen d~cor. Aquasana OptimH2O~ Reverse Osmosis + Claryum~ features a reliable flow rate to deliver clean, healthy water.