Replacement filter for models with WaterSentry filtration system (Coolers + Fountains). Filter should be replaced every 1,500 gallons or 1 year after installation. Equipped with quick-disconnect, 1/4-turn installation, as well as automatic inlet shut-off valve that closes when filter is removed. Designed to reduce lead, particles and chlorine. Also reduces odors and discoloration from incoming water. Filter is tested and certified to NSF 42 and 53 for lead, Class 1 particulate, chlorine taste and odor reduction.; Filter is tested and certified to NSF 42 and 53 for lead, Class 1 particulate, chlorine taste and odor reduction.