iSpring RCC7AK-UV Deluxe Under Sink 7-Stage Reverse Osmosis Drinking Water Filtration System with Alkaline Remineralization and UV Sterilizer-WQA Gold Seal Certified High Capacity Reverse Osmosis water filtration for safer, healthier water. This Deluxe under sink mounted water filter and Point-of-use water softener contains 7 different stages of filtration and sterilization to remove up to 99% of over 1,000 contaminants, including lead (removes up to 98% of lead), chlorine, fluoride, arsenic, hormones, asbestos, calcium, and sodium and virtually all bacteria, giardia, viruses and other microorganisms. Experience clean, safe, good-tasting water every time you turn on the faucet. Enjoy crystal clear ice cubes, fresher tea and coffee, better tasting foods, healthier baby formula & ; even better than most bottled water. With its advanced 11 watt UV sterilization stage, the RCC7AK-UV is the perfect solution to purifying well water and other problem water sources containing excessive microorganisms like water from lakes and streams. For greater efficiency, our unique flow sensor switch turns the UV unit on and off automatically with water flow, saving power and lengthening the life of the UV lamp. Reverse Osmosis (RO) remains the best way to achieve truly pure water. But can water be & too pure ;? RO removes not only harmful pollutants, but also a few helpful minerals. The Alkaline Remineralization (AK) filter restores healthy minerals and a natural alkaline balance, also producing a more natural taste that comes from the presence of the right balance of these minerals. Premium quality components ensure highest reliability and low maintenance for many years to come. Clear see-through 1st stage housing makes filter inspection a snap.Feed Water pH - 3.0 -11.0. Feed Water Pressure - 45-70 psi. Feed Water Temperature- 40-100 F (4 - 38 C)