Enjoy unlimited ultra-fresh, healthy, great tasting drinking water straight from your kitchen tap for cooking and making delicious coffee, tea & ice. Save money, time, and hassle of buying costly, bottled water and live healthier with ultra-safe water that is 99% impurity free. This premium-grade RO-PH90 system has been tested and certified to the highest standard in the industry - WQA gold seal, giving you the purest water possible of all impurities such as chlorine, taste, odor, harmful fluoride, arsenic, lead, and chromium, and is completely free from water leaks, bursts and noises. All USA-made super high capacity filters 1st stage: high-grade 5 micron, 10 inch high-capacity polypropylene sediment filter -removes sediment, particles, and rust. Protects and extends the life of the membrane and system. 2nd stage & 3rd stage: premium extruded carbon block filter - gets rid of unpleasant chlorine, tastes, odors, cloudiness and colors. Also removes VOC and other common impurities from the water. 4th stage: industry's highest quality filmtec (Dow) high rejection TFC reverse osmosis membrane. Removes up to 99% of TDS and impurities such as arsenic, lead, fluoride, chromium, radium and much more. 5th stage: advanced coconut shell refining carbon 10 inch filter - TCR removes any possible residual taste from the tank.