This replacement filter cartridge kit is designed for the Sta-Rite® System 3® S7M120® Modular Media Filter. The S7M120® Filter holds one smaller inner cartridge (100 sqft) and one larger outer cartridge (200 sqft). This Optimum Pool Technologies replacement cartridge kit includes one small and one large replacement cartridge. If it is time to replace your old worn-out cartridges, you've come to the right place!
Replaces the following part numbers:
- 25022-0201S (outer): 16.5"OD x 10"ID x 18.75"L
- 25021-0200S (inner): 8.75"OD x 4"ID x 25.25"L
Old part numbers:
- 25022-0221 (outer)
- 25021-0220 (inner)