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Unicel C-5621 Compatible Pool & Spa Water Filter

Unicel C-5621 R

Unicel C-5621 Compatible Pool & Spa Water Filter
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Product Information

The Unicel C-5621 R is a pool and spa water filter cartridge that is the correct compatible replacement for the following filters:

  • Advanced Spa 22 sq. ft.
  • Filbur FC-3091

The Unicel C-5621 Comp. Pool & Spa Water Filter has an outer diameter of 5 3/16 inches, with a length of 11 7/8 inches. This Unicel spa filter has a closed top with a crescent handle, and an open bottom with a diameter of 1 9/10 inches and with slots. This Unicel C-5621 filter contains 22 square feet of filter media.


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" Thank you for your expert service when helping me get the proper filters for my old pool and filter system. The new ones are perfect and work very well. All the best! " - Jim, Alamo, CA
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