The Unicel C-4305 hot tub filter has been used in a range of hot tub models and brand over the years including select Cal Spas and 1994 Suntub by Sundance spas. It’s alway good practice to confirm that this Unicel cartridge is the same size as the existing cartridge in your spa model to ensure proper fitment and performance.
Filter details:
- Unicel P/N: C-4305
- Diameter: 4-15/16"
- Length: 14-7/8"
- Top: 2-1/8" Open
- Bottom: 2-1/8" Open
- Media: 50 sq.ft.
- Filter Media: 3oz Reemay
- Pleat count: 193
Also compatible replacement for:
- Pleatco PMT50
- Filbur FC-1630
- Martec CL-2807
- Martec CL-2810
- Sonfarrel 220142
- Sonfarrel 220145
- Sonfarrel 220152
- Sundance 6540-497 (1994 Suntub Only)
How long should Unicel hot tub filters last?
While most hot tub filters need to be changed every six to twelve months, Unicel brand filters are made with REEMAY premium trilobal filtration media that delivers 45% more surface area over standard rounded filter fibres and can last up to 18 months or more, depending on your level of hot tub use and filter cleaning routine.
