Certified to NSF/ANSI 58, the RCC7AK-UV consists of 7-stage, layered filtration built around reverse osmosis (RO) technology that removes over 1000+ different kinds of contaminants. The combination of both GAC and CTO filters in the 2nd and 3rd stages provides more protection against harmful chemicals than CTO alone. It features a 75 gallon-per-day capacity RO membrane, it can handle the drinking water needs of even a large family. After flowing through the initial 5 stages of the iSpring RCC7 line of Reverse Osmosis filtering products, the RCC7AK-UV model adds two more stages: an Alkaline Remineralization (AK) stage and an Ultraviolet (UV) stage. The RCC7AK-UV features an 11 watt UV lamp with a flow sensor switch that turns the UV unit on and off automatically with water flow, saving power and lengthening the life of the UV lamp. The AK stage is designed to restore the natural alkalinity and mineral balance of the water. The RO process filtered water but it also removes a few helpful minerals in the process. Designed for do-it-yourself installation by most users, the entire system fits under a standard kitchen sink. All parts necessary for installation are included. Replacement filters are standard sized. A lead-free, solid brass faucet with a brushed nickel finish is included with the system and is usually mounted on the counter as the primary source of drinking water, but output lines can also be connected to your ice maker, coffee maker, etc. The whole system is backed by a 1-year money-back guarantee, a 1-year manufacturer warranty, and iSpring's lifetime technical support provided right here in the USA in Atlanta Georgia. iSpring 7-stage Multi-method Reverse Osmosis Filtration System in White | RCC7AK-UV