Pentair | 179135 | 420 sq ft Filter Cartridges | 4-Pack Replacement Set (R173576 x4)

The Pentair 179135 Filter Cartridge Set is a complete 4-pack replacement kit designed for Pentair 420 square foot cartridge filter systems. This set includes four R173576 filter elements, providing full system coverage for optimal filtration performance. Engineered with pleated synthetic media, these cartridges deliver high dirt-holding capacity and efficient particulate capture while maintaining balanced water flow through the filter housing.

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Key Features

• Complete 4-pack cartridge set for 420 sq ft Pentair filter systems.
• Includes four R173576 replacement filter elements.
• Pleated synthetic media maximizes surface area for efficient debris capture.
• High dirt-holding capacity supports extended service intervals.
• Designed for proper fit and performance in compatible Pentair cartridge filters.
• Ideal replacement set for routine maintenance and full filter refresh.

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Product Overview

The Pentair 179135 420 sq ft Filter Cartridge Set is engineered to restore full filtration performance in Pentair 420 square foot cartridge filter housings. Each set includes four R173576 elements, collectively delivering the full rated filtration area required for proper system operation. The pleated media design increases effective surface area to trap fine particles, dirt, and suspended contaminants while maintaining steady water flow and minimizing pressure loss.

Constructed for durability in chemically treated pool environments, these cartridges are built to withstand repeated cleaning cycles and long-term exposure to sanitizers and balancing agents. Replacing all four cartridges simultaneously ensures balanced filtration, improved water clarity, and optimized circulation system efficiency. Proper maintenance and timely cartridge replacement help extend equipment life and maintain consistent pool performance in residential applications.