Purotwist 4 Stage Gold Reverse Osmosis System PT3000T36-GOLDThe Purotwist 3 Stage Gold Reverse Osmosis System is ideal for: High quality drinking water Clear and clean ice cubes Delicious coffee, tea & beverages Water for pets and plants The PuROTwist 3000 REVERSE OSMOSIS semi-permeable membrane rinses contaminants to the drain. High quality, filtered drinking water is produced and conveniently stored in a sealed tank. The PuROTwist 3000 lead-free faucet easily delivers an abundant supply of clearer, cleaner, and fresher drinking water to you and your family.3 Stage Purification Process: Stage 1 5 Micron Sediment Filter: Removes dirt, sediments, sand, and other physical particles. Stage 2 Pre Carbon Filter: Provides protection to the RO membrane from free chlorine and sediment. Stage 3 Reverse Osmosis Membrane: Membrane reduces a high percentage of dissolved inorganics. Stage 4 Post Carbon Filter: A final polishing process that enhances and clarifies your drinking water. Contaminant reduction:Sand, silt, dirt, rust, aluminum, asbestos, chlorine, taste, odor, Cryptosporidium cysts, Giardia cysts, Lead, Dissolved minerals, Lead, Fluoride, TDS, Chromium, Barium, Cadmium, Nitrate, and Chromium (III) Nitrate.Certification: This unit is a Water Quality Association Gold Seal Certified System. The Water Quality Association (WQA) Gold Seal represents the most credible and independent testing and certification entity in the water industry. The WQA’s Gold Seal represents quality assurance through comprehensive testing and continuous research and evaluation of water treatment technologies.