This Everydrop Ice Filter Is Used In 50 Lb. Ice Makers. This Nsf Certified Filter Reduces Chlorine Taste And Odor And Scale Build Up. Replace Every 2,000 Gallons (7571 Liters) Or 9 Months To Ensure Clean Safe Drinking Water. The Contaminants Or Other Substances Removed Or Reduced By This Water Filter Are Not Necessarily In All Users Water.