The Omnipure CK5520 delivers reliable 1-micron carbon block filtration in a cost-effective replacement body designed to fit Cuno CS-25 and compatible bayonet-style permanent heads. Built from NSF-approved injection-molded polypropylene, this 10"x2.5" cartridge reduces chlorine taste, odor, and sediment without the premium price of OEM replacements.
SPECIFICATIONS
Technical Details
| Model Number | CK5520 |
| Dimensions | 10" L x 2.5" W |
| Filtration Media | Carbon Block |
| Micron Rating | 1 Micron |
| Compatible With | Cuno CS-25 Bayonet Heads |
| Construction | Injection-Molded Polypropylene |
| Certifications | NSF-Approved Materials |
| Reduces | Chlorine, Taste, Odor, Sediment |
INSTALLATION & USE
Replacement Procedure
- Turn off water supply and relieve system pressure by opening downstream faucet
- Twist filter cartridge counterclockwise to unlock from bayonet-style head, then pull straight down to remove
- Align new CK5520 cartridge with bayonet slots, push up firmly, and twist clockwise until locked
- Turn water supply back on slowly and check for leaks at head connection
- Flush filter for 3-5 minutes before returning to service
COMPATIBILITY
System Fitment
The Omnipure CK5520 is engineered as a direct replacement for Cuno 3M CS-25 filter cartridges and fits any system using bayonet-style permanent heads with 10"x2.5" cartridge specifications. This includes point-of-use RO pre-filters, whole-house filtration systems, and commercial beverage equipment. The CK-Series design eliminates the need to purchase expensive OEM replacement bodies while maintaining full compatibility with existing infrastructure.
🔧 Pro Tip: Mark your installation date on the filter body with a permanent marker. Carbon block filters should typically be replaced every 6-12 months depending on water quality and usage, even if flow rate hasn't noticeably decreased.
