CK5521-P 10"x2.5" Carbon Block & Phosphate Filter
Cost-effective bayonet-style replacement body engineered for Cuno CS-511 and CS-711 compatibility, combining 10 micron carbon block filtration with scale and corrosion inhibition
The Omnipure CK5521-P delivers a reliable alternative to higher-priced OEM filter bodies. Built from injection-molded polypropylene using NSF-certified materials, this 10" x 2.5" cartridge fits existing bayonet-style permanent heads while combining chlorine reduction, sediment filtration, and phosphate-based scale prevention in a single replaceable body.
Filter Construction & Performance
| Model Number | CK5521-P |
| Dimensions | 10" L × 2.5" W |
| Filtration Type | Carbon Block + Phosphate |
| Micron Rating | 10 Micron |
| Body Material | Polypropylene (NSF Approved) |
| Connection Type | Bayonet-Style |
| Primary Contaminants | Chlorine, Sediment, Taste, Odor |
| Scale Control | Phosphate Inhibitor |
Why Choose the CK5521-P
Drop-In Compatibility
Designed as a direct replacement for Cuno CS-511 and CS-711 filter bodies, fitting existing bayonet-style permanent mounting heads without modification.
Dual-Action Protection
10 micron carbon block removes chlorine, sediment, and improves taste and odor while integrated phosphate prevents scale buildup and corrosion in plumbing.
NSF-Certified Materials
Manufactured from 100% NSF-approved injection-molded polypropylene for reliability and safety in potable water applications.
Cost-Effective Solution
Omnipure CK-Series delivers the same filtration performance as OEM replacements at a significantly lower price point without compromising quality.
Versatile Applications
Suitable for reverse osmosis systems, whole-house filtration, commercial equipment, and point-of-use installations requiring scale control.
Durable Construction
Robust polypropylene body withstands pressure and temperature variations typical in residential and light commercial water systems.
System Integration
The Omnipure CK5521-P replaces Cuno Water Factory SQC CS-511 and CS-711 filter cartridges in systems using bayonet-style mounting. Common applications include reverse osmosis pre-filtration, whole-house carbon filtration stages, beverage equipment, ice machines, and commercial water treatment systems where both sediment removal and scale prevention are required. The 10" x 2.5" form factor fits standard permanent heads from Cuno 3M Water Filtration systems.
Omnipure has been manufacturing NSF-certified water filtration products for over four decades, delivering OEM-quality performance at accessible prices for residential and commercial installers.
