The Pentair 25022-0225S replacement cartridge is designed for Sta-Rite System 3 SM Series modular media pool and spa filtration systems, specifically the S8M500 model. This large outer cartridge provides approximately 291 square feet of filtration area and captures dirt, debris, and fine particles from circulating pool water. The reinforced pleated polyester media supports efficient filtration performance and extended cleaning intervals.

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Key Features

• Replacement large outer cartridge designed for Sta-Rite System 3 modular media filter model S8M500.
• Provides approximately 291 square feet of filtration surface area for effective debris and contaminant removal.
• Reinforced pleated polyester filter media increases dirt-holding capacity and filtration efficiency.
• Durable molded end caps and reinforced internal core support long service life and repeated cleaning cycles.
• Typical dimensions include about 20-1/8 in outer diameter and approximately 18-1/4 in length for proper fit.
• Designed to work with the corresponding inner cartridge in the S8M500 System 3 filter configuration.

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Product Overview

The Pentair 25022-0225S filter cartridge is an essential filtration element used in Sta-Rite System 3 modular media pool filters. Installed inside the filter housing, the cartridge captures debris and contaminants as water passes through the pleated polyester media, helping maintain clear and balanced pool water.

This cartridge serves as the large outer module in the S8M500 System 3 configuration and works together with a smaller inner cartridge to provide the system’s total filtration capacity. The reinforced filter media and durable molded end caps are engineered for durability and repeated cleaning cycles. Replacing worn or clogged cartridges restores proper water flow and helps maintain reliable filtration performance in Sta-Rite System 3 pool filtration systems.