This large outer cartridge is designed to be used with PENTAIR Sta-Rite System 3 SM-Series 21 in. pool and spa cartridge filter models S8M150. This cartridge has an increased number of pleats within the filter to ensure cleaner water free of debris. Measures 23.5 in. diameter x 23 in. tall; 259 sq. ft. filtration area.
- Increased pleat count for better water filtration
- Pleat design allows you to simply hose off in minutes making servicing a snap
- Reinforced end caps for improved stability
- Cross bands to prevent pleat damage
- Easy to install