The Pentair 179136 520 Filter Replacement Cartridges 4-Pack is a complete cartridge set designed to restore full filtration performance in Pentair 520 series cartridge filter systems. Each pack contains four replacement filter elements engineered with pleated synthetic media to maximize surface area for effective particulate capture. This set supports balanced water flow and enhanced dirt-holding capacity to maintain clearer, healthier pool water.

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Key Features

• Complete 4-pack of replacement cartridges for Pentair 520 series filters.
• Pleated synthetic media maximizes surface area for efficient dirt and debris capture.
• Designed to restore full filtration performance in compatible filter systems.
• Durable construction resists degradation from pool chemicals and cleaning cycles.
• Supports balanced water flow and consistent filtration efficiency.
• Ideal for routine maintenance and full system cartridge replacement.

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Product Overview

The Pentair 179136 520 Filter Replacement Cartridges 4-Pack provides a full set of service elements for Pentair 520 series cartridge filters used in residential pool circulation systems. Each cartridge in the set is engineered with pleated synthetic media that increases effective surface area to trap suspended particles, dirt, and fine debris as water flows through the filter housing. The enhanced surface area supports longer intervals between cleanings while maintaining consistent filtration performance.

Constructed for durability in chemically treated pool environments, these replacement cartridges resist degradation from sanitizers and repeated cleaning cycles. Replacing all four elements simultaneously ensures balanced filtration across the full rated area of the original filter, helping sustain water clarity and reduce strain on circulation equipment. Proper installation and routine cartridge replacement contribute to efficient filtration, extended equipment life, and improved overall pool system performance.