Keep your spa or hot tub water sparkling clean with the Filbur FC-2390-F Replacement Filter Cartridge (UPC: 645544023902). This high-performance 50 sq. ft. cartridge is a premium replacement for the widely used Rainbow Dynamic 50, Pentair R172380, and Unicel C-4950 series. Designed with Reemay® spunbond polyester filtration media, the FC-2390-F offers superior dirt-holding capacity and durability for both residential and commercial applications.

Key Features & Benefits:

Precision OEM Fit: Engineered to match the exact specifications of major spa manufacturers, ensuring a perfect seal and optimal hydraulic flow.

Advanced Filtration Fabric: Utilizes high-quality, 3 oz. polyester media with sharp, deep pleat folds to maximize surface area and capture fine debris, oils, and contaminants.

Structural Integrity: Built with a reinforced PVC center core to prevent collapse under high-pressure conditions and provide consistent water distribution.

Antimicrobial End Caps: Features high-impact, reinforced end caps that resist chemical degradation and inhibit the growth of odor-causing bacteria and mold.

Easy Maintenance: Designed to be washable and reusable, reducing the frequency of replacements and overall maintenance costs.

Specifications:

Outside Diameter: 4-15/16"

Length: 13-5/16"

Top Style: 2-1/8" Open

Bottom Style: 2-1/8" Open

Filtration Area: 50 sq. ft.

Media Weight: 3 oz.

Compatibility Cross-Reference:

Unicel: C-4950, C-4950RA

Pleatco: PRB50-IN, PRB50-IN-M

Pentair / Rainbow: R172380, 17-2380, 817-5000 (Waterway Plastics), Dynamic 50

Aladdin: 15002

Excel Filters: XLS-408

Jacuzzi: 373045