This replacement filter cartridge kit for the System 3 S7M400 Modular Media Filter. Because of its 400 square foot filter area, the S7M400 filter houses one smaller inner cartridge and one larger outer cartridge. This kit includes one small and one large replacement cartridge.
Large Cartridge (25022-0224S)
- 136 square feet of filtration capacity
Small Cartridge (25021-0223S)
- 100 square feet of filtration capacity