The ROES-PH75 is a 6-stage 75 GPD reverse osmosis water filtration system that adds calcium minerals to enhance the water taste for people who prefer mineral water. This system’s mineral cartridge adds only 100% US-made high-purity calcium carbonate to effectively raise pH in the water for those who desire alkaline water. Other re-mineralization reverse osmosis systems will claim to add various beneficial minerals back into the water; however, their mineral formulations are often from unknown and uncertified sources that can lead to potential health concern. With the ROES-PH75 RO system, users will enjoy unlimited great tasting healthy water right at home for drinking and cooking. Save money, time, and from buying costly, bottled water and live healthier with ultra-safe pure mineral water that is contaminant; worry free. Designed, engineered and assembled in the USA, this 6-stage water filtration system is ROES-PH75 system has been tested and certified to the highest standard in the industry- WQA gold seal, to guarantee the highest contaminant removal rates, giving you the purest water possible. Based off APEC’s 20 years of experience in reverse osmosis systems design and production, this system will provide users with high-quality safe drinking water for many years to come. 1st Stage: High-capacity polypropylene sediment filter removes dust, particles, and rust. Protects and extends the life of the membrane and system. 2nd & 3rd Stage: Premium extruded carbon block gets rid of unpleasant chlorine, tastes, odors, cloudiness and colors. Also removes VOCs and other common chemicals from the water. 4th Stage: High Rejection TFC reverse osmosis membrane removes up to 99% of total dissolved solids (TDS – total dissolved solids) and contaminants such as arsenic, lead, fluoride, chromium, radium and much more. 5th Stage: Advanced coconut shell refining carbon filter (TCR – Total Contamination Removal) removes any possible residual taste from the tank. 6th Stage: PH+ alkaline re-mineralizing calcium filter adds calcium carbonate to increase water alkalinity.