RIGOROUSLY TESTED: The Delta Clarifi RO System is the most certified tankless RO system in its class. (Based on leading competitors NSF certifications ASSE 1086 and NSF 42, 53, 58, 372, 401.);CERTIFIED CLEANER: Proven to reduce more than 90 contaminants, including chlorine, chloramine, microplastics, PFAS, lead, arsenic, heavy metals, chemicals, nitrates, pharmaceuticals and more;SUPERIOR FILTRATION: Rigorously tested by IAPMO R&T lab and certified by IAPMO to standards, meeting five NSF standards including NSF-58, NSF-42, NSF-53, NSF-401 and NSF-372 as well as ASSE 1086;FILTER CHANGE ALERTS: Indicator lights and audible alerts help you track filter life and know when a filter needs to be changed;EASY, DIY MAINTENANCE: Carbon and RO filters and optional remineralizer cartridge have a two-year lifespan so you can replace them at the same time quickly and easily - it takes less than a minute to replace each;BEST-IN-CLASS TECH: Unique system design is certified to tolerate hard water without compromising efficiency;LESS PLASTIC WASTE: Provides a more sustainable alternative to single-use, plastic water bottles, saving up to 10,000 bottles per 2-year filter life;FILTERED WATER MADE EASY: Pairs with a Delta Reverse Osmosis Beverage Faucet, available in a variety of styles and finishes, or can be plumbed to fridge water dispenser;COMPACT DESIGN: Saves over 60% of under-sink space compared to tanked systems with a low-profile design about the same size as a desktop computer tower;ENHANCED TASTE AND PH: The optional Clarifi remineralizer cartridge adds those good-for-you minerals, like the electrolytes, calcium and magnesium, back into your filtered drinking water;WASTE LESS WATER: Clarifi system is 87.5% more efficient with a 2:1 filtered-to-waste ratio compared to tanked average 1:4;FRESHLY FILTERED: Tankless, continuous flow for freshly filtered water at the ready as well as a self-flushing feature that automatically cycles water to prevent stagnation;MULTI-STAGE FILTRATION: System provides 6 filtration stages using 3 included cartridges, the Pre-Filter, Reverse Osmosis Filter and Carbon Filter. Optional 7th stage uses a Clarifi Remineralizer Cartridge to replace taste-enhancing minerals removed during the normal RO process;VIDEO TUTORIALS: Find more information in the included user guide, M&I, and Delta Faucet’s YouTube;LIVE CUSTOMER SUPPORT: Backed by Delta Faucet's warranty and highly-trained, live customer support