The Unicel 4CH-935 hot tub filter has a closed top and course SAE 2 inch female threads on the bottom and fits in select Master Spas and Nordic Spas. Master and Nordic Spas may vary the filter size for the same hot tub model based on year and features. Therefore it’s best to confirm that this filter is the same size as the filter in your Master Spa or Nordic Spa model before ordering to ensure proper fitment.
Filter details:
- Part no: 4CH-935
- Diameter: 4-15/16"
- Length: 9-1/4"
- Top: Handle
- Bottom: 2" Female SAE Thread
- 35 sq.ft.
- Filter Media: 3oz
- Pleat count: 219
Also compatible replacement for:
- Waterway 817-4035
- Pleatco PWW35L
- Filbur FC-0170
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 premium high-quality filters that can last up to two years or more, depending on your level of use and cleaning routine.
