Unicel C-8399 Filter for Caldera Spas 73722

The Unicel C-8399 hot tub filter is a compatible replacement for the Caldera OEM 73722 filter which is used in the Caldera Spa models listed below. 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: C-8399
• Diameter: 8″
• Length: 16-1/2″
• Top: Handle
• Bottom: 3-5/8″ Open with lip seal
• Media: 100 sq.ft.
• Filter Media: 3oz Reemay
• Pleat count: 259

Compatible with the following Caldera Spa models:

• Niagra Utopia 2005 – Current
• Geneva Utopia 2005 – Current
• Tahitian Utopia 2005 – Current
• Elation 2005 – Current
• Aspire 2005 – Current
• Cantabria 2014 (3rd Quarter) – Current

Compatible replacement for:

• Caldera OEM 1039607
• Caldera OEM 73722
• Filbur FC-3965
• Pleatco PCD100W

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.