Ensure your drinking water is in top-notch shape with this 8 pack of Elkay 51300C WaterSentry Plus Filter for EZH2O Water Filling Station. This water filter provides clean, great tasting water for all Elkay drinking fountains, water cooler, and bottle fillers. It is compatible with NSF 42, 53, and 372. Your filter should be replaced every 3,000 gallons, or 1 year after installation. This filter was made wtih activated carbon to improve taste, odor, and to reduce contaminants such as lead. Keep on drinkin' crystal clean water in your Elkay bottle filler station with this Elkay 51300C WaterSentry Plus Filter.