G3P800 Reverse Osmosis System, NSF/ANSI Certified, 3:1 Pure to Drain, Tankless,Extra Alkaline Water FilterThis Waterdrop G3P800 tankless RO system requires drilling 2 holes for installation (one for the RO faucet, one for the drain connection). It is IAPMO R&T certified to NSF/ANSI 58 for TDS reduction, NSF/ANSI 42 & 53 for reducing chlorine, bad taste and odor, and NSF/ANSI 372 for lead-free materials. With an 800 GPD high capacity, it can filter a cup of water in about 5 seconds and features a 3:1 pure-to-drain ratio (less wastewater). Tested by a third-party lab (SGS), its 10-stage filtration helps reduce PFAS, fluoride, heavy metals (lead, chromium, iron), salts (nitrate, chloride), large particles, and radioactive substances such as radium, and can also reduce certain organics per the RO membrane technical manual. A smart faucet displays TDS and water quality, with an auto-on LED light. The sleek, tankless design saves under-sink space and delivers purified water on demand. A 30-day price match is included.Upgrade RO water with the WD-ALK35 Alkaline Mineralization Filter: PCC technology raises pH to 7.5-9.5 and adds beneficial minerals for better taste and daily vitality. NSF/ANSI certified for a secure fit and reduced leak risk. Installs easily with RO, under-sink systems, or refrigerators. Lasts up to 6 months. Not compatible with X Series RO systems.