Brizo Pristive™ Reverse Osmosis Filter Cartridge ReplacementExperience the truest essence of water with the Pristive Tankless Reverse Osmosis System. The Pristive Reverse Osmosis Filter is a 4 stage composite filter that reduces more than 90 contaminants covered by NSF 58. Features: 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,