Compatible only with the Pristive Tankless Reverse Osmosis System, the Reverse Osmosis Filter is a 4-stage composite filter that reduces more than 90 contaminants covered by NSF 58 including lead, mercury, radium, copper, arsenic, polyfluoroalkyl substances (PFAs), total dissolved solids (TDS), hardness, parasites, microplastics, and asbestos;Based on the amount of water used, the Reverse Osmosis Filter Cartridge has a life of 1,320 gallons (5,000L) or two years, whichever comes first;Quarter-turn twist cartridge for easy installation and replacement;For cold water use only;Under-sink installation