Pleatco PRB75 = Unicel C-4975 = Filbur FC-2395
75 sq ft hot tub filter, 5" diameter × 20-1/8" long. Top: 2-1/8" open · Bottom: 2-1/8" open. Pleatco application: Dynamic Series V-DSC-75, Series II & III RTL/RCF-75, Custom Molded Products.
Interchangeable cartridges
- Unicel C-4975 confirmed by: Pleatco p.47 (Unicel to Pleatco cross reference) Unicel p.9 (Cartridges by series (dimensional listing))
- Filbur FC-2395 confirmed by: Pleatco p.48 (Filbur to Pleatco cross reference) Filbur p.33 (Reverse cross reference (Unicel to Filbur)) Filbur p.9 (Dimensional cartridge listing)
Published dimensions, side by side
Each manufacturer measures a little differently. Compare these with your old cartridge.
| As published by | Pleatco PRB75 source | Unicel C-4975 source | Filbur FC-2395 source |
|---|---|---|---|
| Outside diameter | 5" | 4-15/16" | 4-15/16" |
| Length | 20-1/8" | 20-1/8" | 20-1/8" |
| Top end | 2-1/8" open | 2-1/8" / open | 2-1/8" open |
| Bottom end | 2-1/8" open | 2-1/8" / open | 2-1/8" open |
| Filter area | 75 sq ft | 75 sq ft | 75 sq ft |
| Pleats | not listed | 210 | not listed |
| Media weight | 3 oz/yd² | 3 oz/yd² | not listed |
Where to buy
Search any retailer for C-4975 or PRB75 or FC-2395. These are the same cartridge under different brand names.
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OEM part numbers this cartridge replaces
As printed in the cited aftermarket catalogs. Match the number on your old cartridge or in your spa manual exactly.
Hot tub brands that use it
From the spa-manufacturer cross reference in the Unicel 2026 Replacement Guide. A brand may use several sizes, so check your measurements.
- Custom Molded Products (models: Top Mount Skim, EZ Twist Top Mount Skim, Top Load Pressure; OEM 25390) Unicel p.33
- Dakota Spas Unicel p.33
- Emerald Spas Unicel p.35
- Hydro Pool Industries Unicel p.39
- Nahani Spas by Maax Unicel p.46
- Pentair Pool Prod (models: Dynamic Series V - DSC-75, Dynamic Series II & III RTL/RCF-75; OEM R173435) Unicel p.47
- Pentair Pool Prod - Rainbow Plastics (models: Dynamic Series II & III - RTL/RCF, Dynamic Series V - DSC-75; OEM 17-2632) Unicel p.52
FAQ
What is the Unicel equivalent of Pleatco PRB75?
The catalogs cross-reference Pleatco PRB75 to Unicel C-4975.
What is the Filbur equivalent of Pleatco PRB75?
The catalogs list Filbur FC-2395.
What size is the PRB75 filter?
Pleatco lists PRB75 as 5" outside diameter by 20-1/8" long, top: 2-1/8" open, bottom: 2-1/8" open, 75 sq ft.
Which OEM part numbers does it replace?
Listed OEM numbers: 17-2632, RTL-75, 25390, R173435.
Sources: Filbur Product Catalog and Reference Guide (2024) · Filbur Product Catalog and Reference Guide (2024) · Pleatco 2023 Catalog & Cross Reference Guide (Pentair) · Pleatco 2023 Catalog & Cross Reference Guide (Pentair) · Pleatco 2023 Catalog & Cross Reference Guide (Pentair) · Unicel 2026 Replacement Guide. Last checked 2026-10-21.