OMNIPURE's CK-Series 1 micron GAC and polyphosphate scale inhibitor cartridges are designed to be affordable alternative replacement filters for CUNO and 3M Aqua-Pure water systems which use existing bayonet-style permanent heads. These filter bodies offer equal or superior filtration capability at a considerably lower price than comparable replacement bodies on the market. CK-Series filters use specially treated activated carbon media and polyphosphate media to effectively remove cysts, chlorine, taste and odors and also inhibit hard water limescale in pipes and appliances. They are a great value for applications where long life, high purity and low change-out frequency are required. No glues or binders were used in the manufacturing process but instead, components are friction-welded together producing a reliable, no-leak seal. These filters are available in a variety of sizes and can be used to service water filters, coffee machines, ice-machines, drinking fountains and in any applications where better tasting water is important.
APEC Item Code
Manufacture Item Code
3M CUNOEquivalent Item Codes
55895-05, CS-21, CS-521, CS-721
2.5” x 10”
Service Life Gal. or 1 year
Compatible Cartridge Alternate Part Numbers
3M Part Numbers: AP51701, AP51706, 5560001, 55600-01
3M ID: 70020015189, 70020041458, 70020041466
Aqua-Pure Part Numbers: AP510, AP522, AP500, AP51706
Cuno Part Numbers: CFS517, 55600-01, CS500, CS-61
Bunn Easy Clear Part Numbers: EQ-TL-1 for EQ-11-TL, ap51701, 51701
The Omnipure Filter Company developed the world's first disposable inline water filter in 1969 and their products soon found regular usage as an accessory attached to ice machines, refrigerators, water coolers, coffee machines, and as a component in other filtration systems such as Reverse Osmosis Systems and other multi-level filtration processes. With over 44 years in the water industry, Omnipure has built a reputation for manufacturing the world's best disposable inline water filters.