Unicel C-4311 hot tub filter with 2-1/8 inch holes top and bottom is a less common size cartridge due to the length that does not fit many spas. It’s best to confirm that this Unicel cartridge is the same size as the existing cartridge in your hot tub model to ensure proper fitment and performance.
Filter details:
- Unicel P/N: C-4311
- Diameter: 4-15/16"
- Length: 12-1/4"
- Top: 2-1/8" Open
- Bottom: 2-1/8" Open
- Media: 45 sq.ft.
- Filter Media: 3oz Reemay
- Pleat count: 212
Compatible replacement for:
- Pleatco PDS45
- Filbur FC-2394.
