Pentair | 25021-0200S | Sta-Rite System 3 Filter Cartridge 100 sf

The Pentair 25021-0200S filter cartridge is a replacement filtration element designed for Sta-Rite System 3 SM-Series pool and spa cartridge filters, specifically the S7M120 model. This cartridge provides 100 square feet of filtration area and captures dirt, debris, and fine particles from circulating pool water. Its pleated polyester media and reinforced construction support efficient filtration and extended service intervals. 

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Key Features

• Replacement cartridge designed for Sta-Rite System 3 SM-Series cartridge filters including model S7M120.
• Provides 100 square feet of filtration surface area for effective debris and contaminant removal.
• Pleated polyester filter media increases dirt holding capacity and filtration efficiency.
• Durable reinforced frame and molded end caps support long service life and repeated cleaning cycles.
• Approximate dimensions of about 8.5 inches diameter and 25–25.5 inches length ensure proper fit.
• Designed as the small inner cartridge used in System 3 S7M120 filter assemblies.

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Product Overview

The Pentair 25021-0200S filter cartridge is a key filtration component used in Sta-Rite System 3 modular media filter systems. Installed inside the filter housing, the cartridge traps debris and contaminants as water passes through the pleated filtration media, helping maintain clear and balanced pool water.

This cartridge provides 100 square feet of filtration area and is commonly used as the smaller inner cartridge in the S7M120 System 3 filter configuration, working alongside a larger outer cartridge. The reinforced polyester media is designed for durability and high dirt holding capacity, allowing longer filtration cycles between cleanings. Replacing worn or clogged cartridges helps restore proper water flow and ensures reliable filtration performance for Sta-Rite System 3 pool filtration systems.