Sta-Rite System 3 S7M400 Modular Media 136 Sq Ft Small Cartridge Replacement
This is the direct replacement small cartridge for the Sta-Rite System 3 S7M400 Modular Media filter system, identified by part number 25021-0223S. This 136 Sq Ft inner filter works alongside a larger outer cartridge to ensure superior debris capture. Engineered for durability, this replacement component helps reduce routine maintenance while delivering clearer, cleaner pool water. It is designed specifically for residential pool filter applications, offering reliable performance as part of the System 3 setup.
$282.02
More System 3 Options
Owner Satisfaction
4.4
/ 5
Category Rank
577
/ 1449
#577 in Pool & Spa Filters
Price vs Category Average
+81%
Above average
Filtration Area
136..
/ sq ft
Who it's for
- Superior Filtration Performance
- Easy Handling and Cleaning
- Guaranteed OEM Fit and Durability
Who should skip it
- High Replacement Cost
- Multi-Element Maintenance Requirement
- Limited Market Availability
Key Specs
Filtration Area
136 sq. ft.
Part Number
25021-0223S
Outer Diameter
8 1/2 inches
Length
25 1/4 inches
Weight
11 lbs
Compatible Model
S7M400
Installation Type
Residential
Warranty
1 Year
Features
- Direct replacement for S7M400 inner filter
- Captures fine debris for clear water
- Durable design minimizes maintenance needs
- Fits Modular Media 400 system
- Provides 136 Sq Ft of filtration area
What customers say
Customers overwhelmingly praise the Sta-Rite S7M400 replacement cartridge for its exceptional filtration performance, consistently restoring pool water clarity better than aftermarket options. Fitment is perfect, ensuring easy installation within the System 3 design. Users also value its impressive longevity, often lasting multiple seasons, which supports the initial purchase. The primary drawback cited is the high cost associated with this proprietary OEM part. Despite the expense, the consensus favors this cartridge, viewing its superior, reliable performance as essential for maintaining optimal system efficiency, prioritizing quality function over budget concerns.
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$282