Pentair 170146 S7M400 Filter Inner & Outer Cartridge Set

The Pentair S7M400 Filter Inner & Outer Cartridge Set 170146 is a replacement cartridge pack designed for Pentair Sta-Rite System 3 S7M400 modular media pool filters. The 170146 is an OEM Pentair cartridge set that includes both the inner and outer filter elements required for proper operation of the S7M400 system. Together, the two cartridges provide a combined 400 square feet of filtration area, with approximately 136 square feet from the inner cartridge and 264 square feet from the outer cartridge to deliver high dirt-holding capacity and improved water clarity. Reinforced pleated polyester filtration media captures fine debris while maintaining strong circulation and efficient filtration performance. Durable polyurethane end caps and precision construction ensure proper fit and long service life in compatible residential in-ground pool filtration systems.

Highlights

• Complete Dual Cartridge Set: Includes both inner and outer cartridges required for Pentair Sta-Rite System 3 S7M400 modular media filter assemblies.

• 400 Square Feet Filtration Capacity: Combined filtration area of approximately 136 sq. ft. inner cartridge and 264 sq. ft. outer cartridge supports extended filter cycles.

• Reinforced Polyester Filter Media: Pleated filtration fabric captures fine debris while maintaining strong water flow and efficient circulation.

• OEM Pentair Construction: Manufactured to original Pentair specifications with durable polyurethane end caps for proper fit and reliable performance.

• Designed for S7M400 Systems: Engineered specifically for Pentair Sta-Rite System 3 S7M400 filters to restore effective pool water filtration.