3M(TM) Water Filtration Products Replacement Filter Cartridge, Model HF20-S, 5615103 Combines cyst, sediment and chlorine taste and odor reduction, while reducing the effects of chlorine corrosion and scale for up to 9,000 gallons (34,069 liters) Sanitary Quick Change (SQC) encapsulated cartridge design allows for fast and easy cartridge change-outs with a 1/4 turn Reduced downtime and service calls with the built-in delivery of a scale inhibitor to reduce theability of calcium and magnesium to precipitate on the evaporator plates as hard scale Genuine OEM replacement part Cuno provides high quality aqua pure water filters for the foodservice industry Use genuine OEM parts for safety reliability and performance