NSF 58 Certified - iSpring RO500-ORB reverse osmosis system is NSF 58 certified for TDS reduction, ensuring top-tier water filtration performance. Industry-leading 2:1 pure-to-waste ratio reduces wastewater by up to 400% compared to traditional RO systems, lowering water bills and minimizing waste. Superb Filtration Performance - Featuring a 3-stage system: a 2-in-1 composite Sediment and Carbon Block filter, an advanced RO membrane, and a Carbon Block Filter for enhanced taste. This RO water filtration system removes up to 99% of over 1,000 contaminants, including lead (98%), chlorine, fluoride, arsenic, asbestos, calcium, and more. Automatic self-cleaning mode rinses the RO membrane after 24 hours of inactivity to extend its lifespan. 500 GPD High Flow Rate - The RO500-ORB reverse osmosis water filter delivers up to 500 gallons of purified water per day with a fast 0.4 GPM flow rate—enough to fill an 8oz glass in just 10 seconds. Enjoy improved efficiency and shorter wait times from this tankless RO system under sink for clean, great-tasting water—perfect for homes, offices, coffee shops, and restaurants. Its compact, tankless design saves up to 70% of under-sink space. Note: This reverse osmosis system equires access to under-sink electricity. Easy, Hassle-Free Installation & Maintenance - Designed for DIY convenience, the reinforced integrated water route ensures a secure, leak-free setup. Filter replacements take just seconds with no need to shut off the water or use tools. The system also comes with a feed water adapter compatible with both 1/2" and 3/8" pipes, making installation quick and versatile. Trusted Support and Warranty - Enjoy peace of mind with a 30-day money-back guarantee and a 1-year manufacturer warranty, with the option to extend coverage upon registration. our dedicated customer support team, based in Atlanta, GA, provides lifetime technical assistance to ensure long-term satisfaction. Convenient Replacement Filters - Compatible with F7-RO500 (2-year high-capacity replacement filter pack) for long-term performance and cost savings.