Pentair Large Cartridge | System 3 | 25022-0224S
- In stock, ready to ship
- Backordered: contact us for ETA
- SKU:
- 25022-0224S
-
Poolaroo Promise
- Fast Shipping — Ships in 1–2 Business Days
- 30-Day Risk-Free Returns — We Pay Return Shipping, No Restocking Fees
- Powered By People Who Care - No Faceless Conglomerate
About This Item
The Pentair Large Cartridge Filter Element (25022-0224S) is the OEM replacement 21 in. outer filter cartridge for the Sta-Rite System 3 Modular Media filter, model S7M400.
This cartridge is the outer filtration element in the System 3's two-piece tank design. It captures debris as pool water passes through its shallow-pleat media before the filtered water returns to circulation. The shallow pleat geometry maximizes surface area for dirt-holding capacity while allowing quick rinse-downs during routine service, without needing to open or disturb the tank housing itself.
This is the larger, outer cartridge for the S7M400. For the matching smaller, inner cartridge, see part number 25021-0223S. Replace both to complete your filter service.
For a combo back of both filter cartridges, see the combo pack: 170146
Specifications
| Pentair Part Number | 25022-0224S |
| Part Name | Large Cartridge (Outer Filter Element) |
| Size | 21 in. |
| Quantity Included | Each |
Fits Into
| Brand | Equipment Line | Model / Part Number | Notes |
| Pentair | System 3 | S7M400 | 21 in. Filter |
Compatibility is based on Pentair parts documentation and available OEM records. This is not an exhaustive list. For certainty, verify the part number in your equipment's manual or on the original part itself before ordering.
Poolaroo Pro Tip
Because the System 3 tank's housing gives you direct access without disassembly, rinse this cartridge with a garden hose every time you clean your filter rather than waiting for a full service cycle. Regular rinsing preserves the pleat spacing and keeps flow rates consistent, which extends the interval between deep-cleaning or replacement.
