The Unicel C-7375 hot tub filter is a compatible replacement for the Caldera Spas 73531 and 1019301 filters. This filter fits various Caldera Spas models. For optimal fit and performance, verify that this filter cartridge matches the dimensions of the old filter in your spa.
Filter details:
- Unicel Part no: C-7375
- Diameter: 7"
- Length: 14-3/4"
- Top: Handle
- Bottom: 2-11/16" Open
- Media: 75 sq.ft.
- Filter Media: 3oz Reemay
- Pleat count: 216
Compatible replacement for:
- Caldera 1019301
- Caldera 73531
- Pleatco PCDN75N
- Filbur FC-3964
How long should Unicel pool and 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.
