The Unicel 4CH-950 hot tub filter has a unique 1-1/4" course SAE threads with a closed top that is used by select Dimension One and Saratoga Spas models. These hot tub manufacturers had different filter sizes that varied for the same hot tub model based on the year of manufacturer and features. Therefore it’s best to confirm that this filter is the same size as the filter in your Dimension One or Saratoga Spa model before ordering to ensure proper fitment.
Filter details:
- Unicel P/N: 4CH-950
- Diameter: 4-5/8"
- Length: 12"
- Top: Handle
- Bottom: 1-1/4" SAE Thread
- 25 sq.ft.
- Filter Media: 3oz
- Pleat count: 139
Also compatible replacement for:
- 1561-04, 74408-99
- Pleatco PSG27.5P2
- Filbur FC-0173
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.
