Restore Maximum Filtration Performance to Your Pentair System 3 Filter

The Pentair System 3 S7M120 Filter Cartridge Kit is a genuine OEM replacement cartridge set engineered to fully restore the filtration performance of Pentair System 3 modular media filters. Designed for systems rated at 300 square feet of total filtration, this complete kit includes both the inner and outer cartridges, ensuring balanced flow, superior debris capture, and long filter life.

If your pool water is struggling to stay clear, pressure is rising faster than normal, or your current cartridges are several seasons old, replacing the full cartridge set—not just one element—is the most effective way to return your filter to like-new performance.

Why Replacing the Full Cartridge Set Matters

The Pentair System 3 filter relies on a dual-element design, using both an inner and outer cartridge to maximize surface area while maintaining strong flow rates. Replacing only one cartridge can lead to uneven filtration, reduced efficiency, and premature wear on the remaining element.

The S7M120 cartridge kit solves this by:

• Restoring full 300 sq ft of filtration area

• Balancing internal flow across both cartridges

• Improving clarity by capturing finer debris

• Reducing strain on your pool pump

• Extending cleaning intervals and cartridge life

This is the correct, factory-recommended replacement solution for long-term performance.

Genuine OEM Pentair Quality You Can Trust

This cartridge kit is manufactured by Pentair to exact OEM specifications for the System 3 platform. Unlike aftermarket cartridges that may have thinner pleats or improper dimensions, the S7M120 cartridges are built with:

• High-capacity pleated media

• Reinforced end caps for structural integrity

• Proper core support for high-flow systems

• Materials engineered for chlorine and chemical resistance

OEM cartridges ensure proper fit, correct sealing, and consistent filtration performance.

Compatibility & Applications

This filter cartridge kit is specifically designed for:

• Pentair System 3 Modular Media Filters

• Systems rated at 300 square feet total filtration

Common applications include:

• Residential in-ground pools

• Pools with higher debris loads

• Systems requiring strong flow with minimal pressure loss

If your filter housing specifies System 3 – 300 sq ft, this is the correct replacement kit.

Performance Benefits You’ll Notice Immediately

Once installed, the Pentair System 3 S7M120 cartridge kit delivers:

• Faster water clarity recovery

• Lower operating pressure after cleaning

• Improved circulation efficiency

• Reduced need for frequent cleanings

• Longer service intervals between cartridge replacements

For pool owners who demand consistently clean water with minimal maintenance, this cartridge kit is a critical component.

Easy Installation & Maintenance

The Pentair System 3 cartridge design allows for straightforward replacement during routine filter service. No special tools are required beyond standard filter access.

Routine maintenance tips:

• Rinse cartridges regularly based on pressure rise

• Replace cartridges when pleats become brittle or flattened

• Always replace both inner and outer cartridges together

Proper care helps maximize cartridge lifespan and filtration efficiency.

Product Specifications

Buy with Confidence from Benchmark Pool Supply

At Benchmark Pool Supply, we stock authentic Pentair replacement cartridges trusted by pool professionals and serious pool owners. The System 3 S7M120 cartridge kit is an investment in water clarity, equipment protection, and long-term system reliability.

When you order from Benchmark Pool Supply, you get:

• Genuine OEM Pentair products

• Accurate compatibility guidance

• Pool-industry expertise

• Reliable fulfillment you can count on