Having up-to-date filters is a necessary step to getting the freshest tastiest water. This long-life multi-stage replacement filter is designed for the Vitapur® GWF8 Water Filtration System and lasts up to 6 months while filtering over 800 liters (211 gallons) of water. It is NSF42 certified to provide great-tasting filtered water by reducing particulates as well as chlorine taste and odor.