WW0002189, Watts, Replacement Media Cartridge For OFTWH-R System

This replacement media cartridge is designed for the 4 GPM OneFlow (R) cold water single cartridge style filter system used on water heaters, hot-beverage systems, appliances, steamers, etc that requires protection from the ill effects of hard water. It is NSF and ANSI certified for material safety and should be replaced once every 2 years by isolating the tank with a bypass valve.