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Rainbow R173434 Dynamic 50 Sq Ft Filter Cartridge - FC-2390

Availability: In Stock

Regular Price: $38.99

Sale Price $29.99

You Save: $9.00  (23%)

Quick Overview

****These filters measure 13-5/16 inches in length. To ensure you are ordering the correct filters please measure your existing filters for a match.****

This 50 Sq Ft filter cartridge by Filbur replaces Rainbow (Pentair) part number R173434 and Waterways part number 817-5000. This filter meet or exceed the original filter cartridge that came with your hot tub and is made from Reemay spun-bound polyester pleated filter media that features anti-microbial technology which prevents microbes such as mold, fungus, and bacteria from growing on your filters.

This spa filter cartridge is a recommended replacement for the Rainbow R173434 Filter Cartridge.


These replacement filters are identical to Rainbow part number R173434, Waterways part number 817-5000, Filbur part number FC-2390, Unicel part number C-4950 and Pleatco part number PRB50IN. These filters are also constructed with thermally bonded polyurethane caps and a punched PVC pipe core that will ensure consistent water flow through your filters along with the durability you depend on.

  • Replaces Pentair / Rainbow part number R173434
  • Replaces Waterway part number 817-5000
  • Diameter: 4-15/16"
  • Length: 13-5/16"
  • Top Open Hole: 2-1/8"
  • Bottom Open Hole: 2-1/8"
  • Filter Area: 50 sq. feet
  • Fits Rainbow Dynamic In-Line 50 Sq Ft R173434
  • Filbur part number FC-2390
  • Unicel part number C-4950
  • Pleatco part number PRB50IN (PRB50-IN-4)
  • Cross Reference: 100533
  • This is not an original Rainbow filter cartridge

To clean your pool filter remember these 4 simple steps; rinse, soak, rinse, dry. Rinse your filter out with a garden hose to remove any debris or dirt still attached to your filter. Next, soak your filter in a filter cleaner solution overnight, then remove your filter from the solution and rinse with a garden hose. Set your filter in a sunny location and let it air dry completely. Finally, reinstall your pool filter per your manufacturer’s instructions.

Additional Information
Delivery Time 2-5 Business Days
Manufacturer Filbur
Technical Specs

Diameter: 4-15/16"
Length: 13-5/16"
Top Open Hole: 2-1/8"
Bottom Open Hole: 2-1/8"
Filter Area: 50 sq. feet

Manufacturer Part # R173434
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