The Pentair 25021-0224S replacement filter cartridge is designed for Sta-Rite System 3 modular media pool and spa filter systems, specifically the S8M500 model. This cartridge provides approximately 209 square feet of filtration area and captures dirt, debris, and fine particles from circulating pool water. The pleated reinforced polyester filter media delivers high dirt-holding capacity and efficient filtration performance.

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Key Features

• Replacement cartridge designed for Sta-Rite System 3 modular media filter model S8M500.
• Provides approximately 209 square feet of filtration surface area for efficient debris removal.
• Pleated reinforced polyester filter media improves dirt holding capacity and filtration efficiency.
• Durable molded end caps and reinforced internal core support long service life and repeated cleaning cycles.
• Typical dimensions are about 14.5 in x 31 in, ensuring proper fit in compatible filter housings.
• Functions as the smaller inner cartridge used with the larger outer element in the S8M500 filter system.

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Product Overview

The Pentair 25021-0224S cartridge is an essential filtration element used in Sta-Rite System 3 modular media filters. Installed inside the filter housing, the cartridge traps dirt, debris, and fine contaminants as pool water flows through the pleated polyester filtration media.

This cartridge serves as the smaller inner filter element in the System 3 S8M500 configuration, which also uses a larger outer cartridge to achieve the full filtration capacity of the system. The reinforced filter media and molded end caps are designed for durability and repeated cleaning cycles. Replacing worn or clogged cartridges restores proper water circulation and helps maintain clear, balanced pool water.