Replacement filter for models with WaterSentry VII filtration system (Coolers + Fountains). Filter should be replaced every 1,500 gallons. Please note, some Elkay filters will ship with a clear cap, instead of a red cap. While colors of filter caps may vary based on inventory levels, there is no effect on filter performance. 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. Spun Polypropylene prefilter mesh to prevent large, coarse sediment and particles from entering and clogging filter media. Filter is certified to NSF 42 and 53 for lead, particulate class 1, chlorine, taste and odor reduction.