Unicel C-7451 Caldera Spa Filter – 50 Sq Ft | FC-3084 & PCD50

Unicel C-7451 Replacement Spa Filter Cartridge — 50 Sq. Ft.

The Unicel C-7451 is a premium 50-square-foot replacement filter cartridge designed for select Caldera Spas that use this original-style filter configuration. Built with durable 3 oz. Reemay 2033 polyester filtration media and 200 pleats, it helps capture dirt, body oils, debris, and other contaminants while maintaining proper water flow through your spa’s filtration system.

Customers searching for Filbur FC-3084, Pleatco PCD50, Caldera OEM 33016 / 033016, Darlly 70511, or Aladdin 15034 may find this to be the compatible replacement.

Key Features

• Genuine Unicel C-7451 replacement spa filter
• 50 sq. ft. filtration area
• 200 pleats for thorough water filtration
• 3 oz. Reemay 2033 polyester filtration media
• 7" outside diameter
• 10-3/4" length
• Semi-circular top handle for easy, tool-free removal
• 2" male slip fitting bottom connection
• Designed for select Caldera Spa filter applications
• Helps maintain efficient spa water flow
• Made in USA

Specifications

• Manufacturer: Unicel
• Part Number: C-7451
• Filter Area: 50 sq. ft.
• Outside Diameter: 7"
• Length: 10-3/4"
• Pleat Count: 200
• Filter Media: 3 oz. Reemay 2033 polyester
• Top: Semi-circular handle
• Bottom: 2" male slip fitting

Cross-Reference / Replacement Part Numbers

Customers searching for any of the following part numbers may find this to be a compatible replacement:

• Unicel: C-7451
• Filbur: FC-3084
• Pleatco: PCD50
• Caldera OEM: 33016 | 033016
• Darlly: 70511
• Aladdin: 15034

Compatibility & Fitment

The Unicel C-7451 is designed for select Caldera Spas using this original-style 50-square-foot filter configuration with a 2-inch male slip fitting on the bottom. This is not the newer open-bottom Caldera filter configuration.

Spa manufacturers can change filter configurations between models and production years. Before ordering, please compare your existing filter’s part number, outside diameter (7"), overall length (10-3/4"), handle style (semi-circular), and bottom connection (2" male slip fitting) to confirm this is the correct replacement.

Why Buy From Red Rock Spas?

Red Rock Spas specializes in hot tubs, spa filters, replacement parts, and water-care products. If you’re unsure whether the Unicel C-7451 is the right filter for your Caldera Spa, our team can help you identify the correct replacement — just reach out before ordering.