Pentair System:3™ Mod Media™ 400 Sq Ft Top Mount Filter Black
The Pentair System:3™ Mod Media™ 400 Sq Ft Top Mount Filter (S7M400) handles 2–3 times more dirt than other filters — delivering maintenance-free performance for up to a full season between cleanings. Sta-Rite's perfectly balanced flow and integral manifold design are engineered for the ultimate in labor savings. 400 sq ft of modular media across two cartridges, rated for 115 GPM and pools up to 55,000 gallons (8-hour turnover).
Dura-Glas™ glass/resin two-piece tank in matte black, 28.5-inch diameter, ANSI Standard 50 certified, green certified. 50-inch vertical clearance required. Backed by a 1-year warranty.
Key Features
2–3× More Dirt Capacity
Handles 2–3 times more dirt than conventional filters — up to a full season between cleanings in many applications.
400 Sq Ft — Two Modular Media Cartridges
400 sq ft of modular media across two cartridges — maximum filtration capacity in the 28.5-inch System:3 tank.
115 GPM Flow Rate
Handles pools up to 55,000 gallons at 8-hour turnover.
Balanced Flow / Integral Manifold
Engineered for perfectly balanced flow across both media cartridges — the standard of the industry.
Dura-Glas™ Matte Black Tank
Glass/resin construction in matte black — durable and attractive in any pool setting.
ANSI 50 / Green Certified / 1-Year Warranty
Certified performance with energy-efficient operation and Pentair warranty.
Who It's For
- In-ground pool and spa owners who want maximum System:3 capacity at 115 GPM in the 28.5-inch tank
- Anyone who wants near-seasonal maintenance-free operation from their filter
- Existing Sta-Rite System:3 users who want maximum modular media area in the S7 tank size
Specifications
Performance
| Filtration Area | 400 sq ft |
| Cartridges | 2 Modular Media Elements |
| Design / Max Flow Rate | 115 GPM |
| Max Working Pressure | 50 PSI |
| Pool Size (8-hr turnover) | Up to 55,000 gallons |
Tank & Plumbing
| Tank Material | Dura-Glas™ Glass/Resin |
| Tank Diameter | 28.5 in |
| Tank Color / Finish | Matte Black |
| Plumbing Size | 2 in NPT |
| Side Clearance Required | 36 in |
| Vertical Clearance Required | 50 in |
Physical
| Product Height | 42 in |
| Product Weight | 135 lb |
| Shipping Dimensions | 27 × 27 × 40.5 in |
Approvals & Warranty
| Certifications | ANSI Standard 50 Certified |
| Energy Efficient | Yes (Green Certified) |
| Warranty | 1 Year |
What's in the Box
- Pentair System:3 S7M400 Modular Media Filter Tank
- Two Modular Media Cartridge Elements
- User Manual
Warranty
The Pentair System:3 S7M400 comes with a 1-year manufacturer warranty. Clearflow Pool Supply is an authorized Pentair dealer and will assist with any warranty service needed.
Downloads
Frequently Asked Questions
How does the S7M400 (400 sq ft) compare to the S7M120 (300 sq ft)?
Both are System:3 modular media filters in the same 28.5-inch Dura-Glas tank. The S7M400 has 33% more filter area (400 vs. 300 sq ft) across two cartridges vs. the S7M120's single media assembly — providing more dirt capacity and longer service intervals. The S7M400 is rated for 115 GPM (vs. 100 GPM for the S7M120) and covers pools up to 55,000 gallons at 8-hour turnover.