Feel assured with every sip, knowing you're providing top-quality water for yourself and your family. The Aquifer reverse osmosis (RO) water filtration system effectively reduces contaminants such as arsenic, fluoride, TDS, bacteria, viruses, lead, mercury, chlorine, and pharmaceuticals in your cold water...Read More Features: Efficiently reduces contaminants including arsenic, fluoride, TDS, bacteria, viruses, lead, mercury, chlorine, and pharmaceuticals in cold water. The filter head automatically shuts off the water supply when the cartridge is removed. To maintain optimal performance, replace the RO sediment prefilter, carbon block CTO filter, and carbon block VOC filter every six months. Comes with three filter cartridges: K-22157 (sediment prefilter), K-22158 (carbon block CTO filter), and K-23334 (carbon block VOC filter). Specifications: Constructed from high-impact plastic. Designed for under-sink installation and for cold water use only. Features a quarter-turn twist cartridge for easy installation and replacement.