Pentair Sta-Rite System 3 S7M120 Replacement Cartridge Set 170145 – 300 Sq Ft Inner & Outer Modules
Replacement Filter Cartridges
Pentair Sta-Rite System 3 S7M120 Replacement Cartridge Set - Inner & Outer Modules
Complete genuine Pentair inner and outer replacement cartridge module set for Sta-Rite System 3 S7M120 modular media filters.
Warranty Information
60-Day Limited Manufacturer's Warranty
Ultimate Pools is your first point of contact for compatibility verification, installation guidance, and warranty support.
The Pentair Sta-Rite System 3 Replacement Cartridge Set (170145) is a genuine OEM replacement module kit designed specifically for the Sta-Rite System 3 S7M120 modular media filter. This complete replacement set includes both the inner and outer filter cartridges required to restore your filtration system to peak operating performance.
With a combined 300 square feet of filtration area, the System 3 modular design delivers outstanding dirt-holding capacity, excellent hydraulic efficiency, and crystal-clear pool water. Replacing both cartridges together helps maintain balanced filtration, proper water flow, and longer filter cycles.
Key Features
Includes both the inner and outer replacement cartridges required for a complete System 3 filter service.
Combined 100 sq. ft. inner and 200 sq. ft. outer cartridges provide exceptional filtration capacity.
Manufactured to original Pentair specifications for proper fit, performance, and durability.
Matching inner and outer cartridges help maintain proper system flow and filtration efficiency.
High-capacity media provides excellent dirt-holding capability for extended operation.
Direct replacement modules simplify maintenance and help restore original filter performance.
Compatibility
Compatible with:
- Pentair Sta-Rite System 3 S7M120 Modular Media Filter
- Inner Cartridge: 25021-0200S
- Outer Cartridge: 25022-0201S
This complete replacement set is designed exclusively for the Sta-Rite System 3 S7M120 filter. Verify your filter model and replacement part number before ordering. Both cartridges should be replaced together for optimum filtration performance.
Specifications
| SKU | 170145 |
| Brand | Pentair |
| Product Type | Pool Filter Cartridge Set |
| Total Filtration Area | 300 sq. ft. |
| Inner Cartridge Area | 100 sq. ft. |
| Outer Cartridge Area | 200 sq. ft. |
| Includes | 1 Inner Cartridge & 1 Outer Cartridge |
| Inner Cartridge Part Number | 25021-0200S |
| Outer Cartridge Part Number | 25022-0201S |
| Compatible Filter | Pentair Sta-Rite System 3 S7M120 |
| Package Dimensions | 30.5 × 11 × 11 inches |
| Warranty | 60-Day Limited Manufacturer's Warranty |
| Application | Residential and commercial swimming pool filtration |
Frequently Asked Questions
Yes. This kit includes both the inner (100 sq. ft.) and outer (200 sq. ft.) cartridges required for a complete S7M120 filter replacement.
This replacement set is designed specifically for the Pentair Sta-Rite System 3 S7M120 modular media filter.
Yes. Replacing both the inner and outer cartridges together helps maintain balanced filtration, proper water flow, and maximum filter efficiency.
Clean the cartridges whenever the filter pressure increases approximately 8–10 PSI above the clean starting pressure. Regular cleaning helps maximize cartridge life and filtration performance. For a deep clean, you can use the Summer Smiles Klean Filter.
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