Pleatco PRB75 Spa Filter – 75 sq. ft. Cartridge (Hydropool 4520008, C-4975, FC-2395)

The Pleatco PRB75 cartridge is a 75 sq. ft. replacement filter designed for spas and swim spas that use a 20-inch drop-in style cartridge. It is the original filter for several Hydropool self-cleaning spas and is a direct equivalent to Rainbow, Unicel, Filbur, and Pentair cartridges of the same size.

Features

• Filter area: 75 sq. ft.
• Dimensions: 20 1/8 in. high × 5 in. in diameter (51 cm × 12.7 cm)
• Openings: 2 1/8 in. (5.4 cm) at the top and bottom — no handle or threads
• Filter media: 3 oz/yd² Pleatco fabric with high fiber density to capture fine particles without restricting flow
• Construction: reinforced center core, Super-Bond bands, and break-resistant end caps
• Washable and reusable — simply rinse with a garden hose

PRB75 can usually be used to replace the 4520008 and 4520030

filter for Hydropool self-cleaning spa models: 395, 495, 570, 670, 695, 720, 770, 790, 700, 800, 970, and 1038

Equivalent part numbers

Directly replaces: Unicel C-4975 · Filbur FC-2395 · Rainbow RTL-75 and RCF-75 · Dynamic Series V-DSC-75 · Custom Molded Products 25390 · Pentair R173435 and R172503 · 17-2632 · AK-3051.

Maintenance

Rinse the cartridge every 2 to 4 weeks and soak it in cartridge cleaner once per season. A well-maintained cartridge typically lasts 12 to 18 months. We recommend keeping a second one on hand so you can soak one without ever having to shut down the spa.

Check the dimensions of your current cartridge before ordering. Have a question about compatibility? Send us a message and we’ll confirm the right model.