Pentair Sta-Rite System 3 S7M400 Cartridge Pack 400 Sq Ft 170146

Pentair Sta-Rite System 3 S7M400 Cartridge Pack 400 Sq Ft 170146

Renew a Sta-Rite System 3 S7M400 modular media filter with the genuine OEM 170146 cartridge pack. The pack contains both modules the S7M400 uses — the large outer cartridge and the small inner cartridge — for a complete 400 sq ft media change in one box.

🚩 PRO TIP: Replace both modules at the same time: the inner and outer cartridges age together, and fitting a new outer module over a worn inner one leaves filtration uneven. Hose the modules down from top to bottom at a 45-degree angle when you clean them, and never use a pressure washer — it damages the pleats.

PRODUCT FEATURES & SPECIFICATIONS:

• Brand: Pentair Sta-Rite
• MPN: 170146
• Type: Pool & Spa Filter Cartridges
• Part: Inner and outer replacement cartridge pack
• Fits: Sta-Rite System 3 Modular Media filter S7M400 (21 in filter)
• Filter Area: 400 sq ft total
• Contents: Large cartridge 25022-0224S (264 sq ft) and small cartridge 25021-0223S (136 sq ft)
• Cross-Reference: 25022-0224S, 25021-0223S
• Weight: 33 lb

FREQUENTLY ASKED QUESTIONS:

• Which filter does the Pentair 170146 cartridge pack fit? The Pentair 170146 fits the Sta-Rite System 3 Modular Media S7M400 filter, the 21 in filter model rated at 400 sq ft.
• What is included in the Pentair 170146 pack? The Pentair 170146 pack includes both S7M400 modules: the large outer cartridge 25022-0224S and the small inner cartridge 25021-0223S.
• Can I replace just one module instead of the whole 170146 pack? The two modules are also sold individually as 25022-0224S and 25021-0223S, but the 170146 pack replaces both together so the full 400 sq ft of media is renewed at once.

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