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Filtersfast FF-0521 Replacement for Unicel C-8610 Pool Filter


Retail: $79.99 /ea
You Save: 13%
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Retail: $79.99
You Save: 13%
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Treat your pool or spa with the best by installing the Filtersfast FF-0521 Replacement for Unicel C-8610 Pool Filter. This high-quality replacement filter features a pleated, open top and open bottom style for the ultimate performance. It contains 100 square feet of pleated polyester media filtration fabric to purify and clean the water in your pool or spa. Remove those pollutants and focus on the fun when you choose this filter!


  • Part Number: FF-0521
  • Replaces Part Number: C-8610
  • Diameter: 8 1/2"
  • Top: 4 1/16" with Gasket
  • Bottom: 4 1/16"
  • Length: 23 3/8"
  • Surface Area: 100 square feet
  • Filter Media: 4 oz.


Cleaning your FiltersFast FF-0521 Filter:

  • It is time to clean your spa or pool filter cartridge when you notice a decrease in the pressure from your jets, or when the pressure in your pool filter tank increases by 8 psi from when the filter was newly installed.
  • In order to clean the pool filter, first remove it from its canister and use a garden hose to dislodge any debris between the pleats. Soak the pool filter in commercially prepared filter cleaner, or spray with the same to remove organic material and oils. To remove stains soak overnight in a solution of one quart bleach and 5 gallons of water.
  • Thoroughly rinse the pool filter cartridge with fresh water and reinstall it into the canister. Be sure to follow manufacturer's directions for installing the replacement pool filter.
  • DO NOT use a high-pressure car wash wand, a stiff brush or acid wash to clean the pool filter cartridges as these methods can damage the filter media.

Compatible Parts:

The Filtersfast FF-0521 Replacement for Unicel C-8610 Pool Filter is the correct replacement for the following part numbers:

  • Aladdin 19905
  • Aladdin 19905
  • Hayward C-1100
  • Unicel C-8610
  • C1100
  • Hayward CX1100-RE
  • Filbur FC-1290
  • Hayward C-1100 100 sq. ft.
  • Hayward CX1100-RE
  • PA100
  • Pleatco PA100/-M/-4
  • Pleatco PA100/-M/-4
  • Star Clear II C1100
  • Unicel C-8610