I bought it as a replacement and didnt realize it was the wrong one. The Genuine Watersentry 51600C is an NSF/ANSI certified high-capacity water filter cartridge designed to reduce chlorine, remove lead, and eliminate odor from your water supply. Made of durable plastic, this enhanced bottle filling station can process up to 6000 gallons of water, making it ideal for commercial use in restaurants and other food service establishments. With ANSI external testing certification, this product ensures that your water is clean and safe for consumption, giving you peace of mind for your business operations.