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Hot Springs / Tiger River 65 Sq Ft Spa Filter Cartridge FC-3960

Availability: In Stock Ships Today

Regular Price: $54.99

Sale Price $43.99

You Save: $11.00  (20%)

Quick Overview

The Watkins 65 Sq Ft replacement filter cartridge replaces Hot Springs / Tiger River 31114 Filter Cartridges and is identical to Filbur part number FC-3960, Unicel part number C-8465 and Pleatco part number PWK65.

This 65 sq ft cartridge is 10-1/2 inch in length by 8-1/2 inch in diameter and has a 3 inch top opening and 3 inch bottom opening. This cartridge is designed for spas and hot tubs manufactured by Watkins and Hot Springs.


Pleatco filter cartridges are made from Reemay spun-bound polyester pleated filter media and include thermally bonded polyurethane caps with punched PVC pipe cores to ensure durability and a consistent flow. They feature Anti-Microbial technology preventing microbes such as mold, fungi, bacteria, and mildew from growing.

  • Replaces Watkins, Hot Springs, Tiger River part number 31114
  • Length: 10-1/2"
  • Diameter: 8-1/2"
  • Top: 3" Opening
  • Bottom: 3" Opening
  • Square Feet: 65
  • Filbur part number FC-3960
  • Unicel part number C-8465
  • Pleatco part number PWK65
  • Cross Reference: UNIC8465, 46203645544039606
  • This is not an original Watkins cartridge

Fits the following Watkins spa models:
Hot Springs (Watkins), Tiger River (Watkins), Grandee (Watkins), Classic (Watkins), Sovereign (Watkins)


To clean your filter cartridge 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 Pleatco
Technical Specs
  • Length: 10-1/2"
  • Diameter: 8-1/2"
  • Top: 3" Opening
  • Bottom: 3" Opening
  • Square Feet: 65
  • SKU PLE-051-9188
    Manufacturer Part # 31114
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