GlacierFresh Alkaline Reverse Osmosis System | NSF 58 Certified | 3:1 Pure-to-Drain Ratio

Key Features Electricity-Free Operation: Runs on standard water pressure alone — no pump, no power cord, no electricity bill. Ideal for off-grid setups or any kitchen where simplicity matters. Alkaline Remineralization Stage: After RO purification, water passes through a natural mineral filter that restores beneficial calcium, magnesium, and potassium ions — raising pH to a healthy 7.5–8.5 for better-tasting, antioxidant-rich water. 800 GPD Ultra-Fast Output: Industry-leading flow rate fills a glass in seconds. Contaminant Removal: 7-stage filtration eliminates chlorine, fluoride, lead, arsenic（AS(V)), heavy metals, PFAS, microplastics, bacteria, viruses, and 1,000+ harmful substances before mineralization begins. Tank inside Space-Saving Design: Up to 70% more compact than traditional tank-based RO systems — maximizes under-sink storage. 3:1 Pure-to-Drain Ratio: Significantly more water-efficient than conventional RO systems — better for your household and the environment. NSF 58 Certified Components: Every filtration stage meets strict NSF 58 safety standards for verified performance and peace of mind. Tool-Free Filter Replacement: Simply pull the latch, remove, and click in a new cartridge — no plumber needed. Smart Pressure Indicator: Real-time inlet pressure display so you always know your system is performing at its best. Why Alkaline RO? Standard RO removes virtually everything — including beneficial minerals. The U03 Alkaline restores what matters: calcium, magnesium, and potassium are reintroduced through a post-RO mineral stage, resulting in water that is both exceptionally pure and naturally enriched. The slightly elevated pH (7.5–8.5) is preferred by athletes, health enthusiasts, and anyone who finds standard RO water tasting flat or acidic. Who Is This For? Health-conscious families who want remineralized, alkaline water without the cost of a separate alkaline filter system; households preferring electricity-free operation; coffee and tea lovers seeking clean water with a smooth, rounded taste; parents wanting contaminant-free, mineral-balanced water for children; and eco-conscious homes reducing plastic bottle waste. Pure water, restored minerals, zero electricity. The GlacierFresh U03 Alkaline RO System is the smart upgrade for households that want the gold standard of purification — with the natural goodness added back in. Warranty & Returns Free shipping on all US orders. 30-day easy returns. Two-Year Warranty. Order handling time: 1–2 days. Delivery: 1–7 working days. Learn more about our policies