Pentair

Pentair System 3 S7M120 Filter Cartridge Kit – 300 sq ft

Regular price $492.95 Sale price$550.00

OEM Cartridges for Sta-Rite System 3 S7M120 Filters

When your pool water starts to look cloudy or your filter pressure rises too quickly, it’s time to replace your cartridges. The Pentair System 3 S7M120 Modular Media 300 Filter Cartridge Kit includes both the inner and outer cartridges needed to restore your Sta-Rite System 3 S7M120 filter to factory performance.

With a combined 300 sq. ft. of filtration area, this kit provides superior water clarity, longer cycles between cleanings, and reliable operation season after season.


Why Choose Pentair OEM Cartridges?

  • Exact Fit & Seal – Engineered for the Sta-Rite System 3 S7M120 filter housing.

  • Superior Filtration – Captures fine debris and contaminants for sparkling clear water.

  • Durable Construction – Built from high-strength polyester media for long service life.

  • Easy Maintenance – Simply hose off with water to extend lifespan between replacements.

  • Trusted Brand – Pentair is a leader in pool and spa filtration.


Kit Includes

  • 1x Outer Cartridge (200 sq. ft.)

  • 1x Inner Cartridge (100 sq. ft.)

  • Total System Filtration: 300 sq. ft.

This complete kit ensures both cartridges are replaced together, which is recommended for balanced water flow and consistent filtration.


When to Replace Filter Cartridges

Pool professionals recommend replacing cartridges every 2–3 years, depending on pool size, usage, and water chemistry. Signs it’s time to replace include:

  • Persistent cloudy water even after shocking

  • Higher operating pressure that doesn’t improve with cleaning

  • Visible tears or wear in the filter media

  • Reduced water flow through your system


Key Features

  • OEM Pentair Sta-Rite System 3 S7M120 cartridge kit

  • Includes inner and outer cartridge set

  • 300 sq. ft. total filtration area

  • Ensures crystal-clear pool water

  • Durable polyester media for long life


FAQs

Q: Will this kit fit other Sta-Rite System 3 models?
A: No, this kit is designed specifically for the S7M120 Modular Media 300 filter.

Q: How often should I replace these cartridges?
A: Typically every 2–3 years, or sooner if heavily used.

Q: Can I buy the cartridges separately?
A: Yes, but replacing both at once ensures balanced flow and maximum performance.

Q: Is this a genuine Pentair part?
A: Yes, this is an OEM Pentair replacement kit for the S7M120 filter.


Keep Your Pool Water Sparkling

Don’t let worn-out cartridges reduce your water clarity or strain your pump. The Pentair System 3 S7M120 Modular Media 300 Filter Cartridge Kit restores peak filtration performance so you can enjoy a clean, clear, and inviting pool.

👉 Order today for reliable OEM quality and long-lasting filtration.



Regular price $492.95 Sale price$550.00you save $57.05
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