Product Description
4.5" OD String Wound Polypropylene Water Filter Cartridges – High-Capacity Sediment Filtration for Clean, Clear Water
Upgrade your water filtration system with 4.5" OD String Wound Polypropylene Water Filter Cartridges, engineered for exceptional performance in sediment removal across residential, commercial, and industrial applications. Constructed with FDA-grade polypropylene and tested to meet NSF/ANSI Standard 42, these cartridges are ideal for Point of Entry (POE) whole house systems. The unique diagonal winding pattern creates hundreds of tapered, spiral pathways, allowing contaminants to be captured throughout the entire cartridge—not just on the surface. This depth-loading design enables superior dirt-holding capacity while minimizing pressure drop, even under heavy sediment loads. Available in 10" and 20" lengths with micron ratings of 1, 5, 10, 25, and 50, these filters offer a reliable, high-performance solution for treating water with varying sediment levels.
Key Features: Engineered for Deep Filtration and Broad Compatibility
High-Efficiency Sediment Removal
Effectively filters out dirt, sand, rust, silt, and suspended particles for improved water clarity and protection of downstream systems.
Depth Filtration with No Surface Blinding
Filtration occurs throughout the full depth of the cartridge, capturing large volumes of sediment without rapid pressure rise.
FDA-Grade Polypropylene Construction
Safe for use in potable water applications; chemical- and bacteria-resistant for clean and hygienic filtration.
Tested to NSF/ANSI 42 Standards
Independently certified to reduce contaminants that affect taste, odor, and appearance—ensuring water that’s crisp, clean, and refreshing.
Universal Housing Compatibility
Designed to fit all standard 4.5" diameter filter housings, including those from Waterite, Harmsco, GE Osmonics, Flomatic, Clack, and Watts.
Wide Range of Micron Ratings
Choose from 1, 5, 10, 25, or 50 micron to match your application needs, from fine filtration to coarse particle removal.
Ideal for Whole House and Commercial Use
Perfect for POE residential systems, light industrial applications, and as pre-filtration before UV or reverse osmosis systems.
Specifications: Built for Reliability in Any Setting
Material: FDA-grade polypropylene (filter and core)
Outer Diameter: 4-1/2"
Lengths Available: 10" or 20"
Micron Ratings: 1, 5, 10, 25, 50
Temperature Range: Up to 120°F (49°C)
Certifications: NSF/ANSI 42
Browse More Filtration Options for Your System
Looking for a more economical option? Check out our Spun Polypropylene Sediment Filter variation—a cost-effective solution for most applications with solid overall performance.
Need more filter sizes and types? Browse our full selection on the Big Blue Water Filters page to find additional cartridges compatible with 4.5" diameter housings.
For UV systems, housings, and all filtration accessories, visit our Commercial Water Filters and UV Parts page for a complete range of components.
Performance-Driven Filtration You Can Rely On
With advanced depth filtration, rugged construction, and NSF certification, these 4.5" OD String Wound Polypropylene Water Filter Cartridges deliver exceptional sediment removal and consistent water quality. Whether you're filtering water for a whole home or a commercial process, these cartridges offer the performance, safety, and compatibility needed for dependable, long-term operation. Choose the trusted solution for clean, clear, and healthier water—built for the challenges of real-world filtration.
