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Hot Springs 30 Sq Ft Spa Filter Cartridge 31489 - FC-3915

Availability: In Stock

Regular Price: $39.99

Sale Price $24.99

You Save: $15.00  (37%)

Quick Overview

**** These filters measure 10-1/2 inches in length. To ensure you are ordering the correct filters please measure your existing filters for a match.****

This Filbur replacement hot tub filter cartridge replaces the 30 Sq Ft Hot Springs (Watkins) 31489 and 0969601 filter cartridges. 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 Watkins Hot Springs 31489 Filter Cartridge.


These replacement Hot Springs spa filters are identical to Watkins / Hot Springs part numbers 0969601 and 31489, Filbur part number FC-3915, Unicel part number C-6430 and Pleatco part number PWK30. 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 (Watkins) Hot Springs part numbers 31489, 0969601
  • Length: 10-1/2"
  • Diameter: 6"
  • Top: 1-15/16" Opening
  • Bottom: 1-15/16" Opening
  • Square Feet: 30
  • Filbur part number FC-3915
  • Unicel part number C-6430
  • Pleatco part number PWK30
  • This is not an original Hot Springs 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

Length: 10-1/2"
Diameter: 6"
Top: 1-15/16" Opening
Bottom: 1-15/16" Opening
Square Feet: 30

Manufacturer Part # 31489
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