Cartridge Set (4PK) Replacement Fits SwimClear® C-4520 by Optimum Pool Technologies

Save $80.01
Optimum Pool TechnologiesSKU: OPT-425-4PK

Sale price$159.99 Regular price$240


This complete set of 4 filter cartridge elements is proudly made in the USA by Optimum Pool Technologies (OPT) who offers high-quality replacement cartridges specifically designed to replace those found in the Swim Clear® C-4520 pool filter.

These filter cartridges each contain 112 square feet of pleat material in each cartridge, totaling 448 square feet of filtration. We guarantee compatibility with your filtration system!

Only need to replace 1 cartridge? We also offer a single Optimum Pool Tech. replacement pool filter cartridge for the Swim Clear® C-4520 filter tank.

  • Made in USA with high quality filtration media that was made specifically for durability and cleanability. 
  • Replaces Part: OEM# CX875RE, CX875REM Unicel®# C-7489, Pleatco® # PA112, PA112-4 Filbur® # FC-1275
  • Length: 25-1/2"
  • Outside Diameter: 7"
  • Inside Diameter: 3"
  • Used with Hayward® Swim Clear® C4500, C4520, C-4520 Cartridge Filter
  • Includes support bands around each cartridge element.
  • Four 112 sq. ft. cartridges required.
Statements of compatibility here are 100% guaranteed by Pool Guy Supply, Inc. and are not attributable to or made by Hayward® or any other original equipment manufacturer (OEM) of products sold on this website.

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Customer Reviews

Based on 3 reviews
Tom Mahn
ordered and got

I ordered cartridge filters for my inground pool and received them quickly. Web site was easy to use.

Lyle Morrow

Cartridge Set (4PK) Replacement Fits SwimClear® C-4520 by Optimum Pool Technologies


Product was good!!

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