The Unicel M-4306 hot tub filter is a pair, each filter is 6-5/8 inches long and the two stacked have a total length of 13-1/4 inches. For optimal fit and performance, verify that this filter cartridge matches the dimensions of the old filter in your spa.
Filter details:
- Unicel P/N: M-4306
- Diameter: 4-15/16"
- Length: 6-5/8"
- Top: 2-1/8" Hole
- Bottom: 2-1/8" Hole
- Media: 50 sq.ft. (Pair)
- Filter Media: 3oz Reemay
- NOTE* Price is for two filters, sold in a pair.
Compatible replacement for:
- Pleatco PRB25SF-JH-PAIR
- Filbur FC-2387
- Unicel C-4405
- 817-5010
- 17-2464
- R173433
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.
