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C-4975 spa filter equivalents
Part number C-4975 appears in 1 cross-reference row below. Each row lists the OEM, Unicel and Pleatco numbers that the source documents treat as interchangeable, plus the cartridge size so you can confirm against your old filter.
The same numbers, on one page, are in the cross-reference lookup. A schedule for this part number, and the buy link, are on the replacement schedule and reorder page. Published intervals by brand are in the replace and clean calculator.
PDC Spas C-4975 cartridge (OEM FLT-SWIM75-CART), 4-15/16" (125 mm) × 20-1/8" (511 mm), 75 sq ft. Unicel C-4975, Pleatco PRB75.
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| OEM | FLT-SWIM75-CART |
|---|---|
| Unicel | C-4975 |
| Pleatco | PRB75 |
| Filbur | FC-2395 |
| Size | 4-15/16" (125 mm) × 20-1/8" (511 mm), 75 sq ft |
Sources
- PDC Spas (manufacturer filter guide, 2025): TruSwim, 2016–present: FLT-SWIM75-CART, 75 sq ft, 5" × 20-1/8", 2" center hole, Unicel C-4975 (PDF)
- Unicel 2026 Replacement Guide: Spec table PDF p.9 (printed p.5): C-4975, 4-15/16" × 20-1/8", 2-1/8" open both ends, 210 pleats, 3 oz, 75 sq ft. Not on the PDC block. (PDF)
- Pleatco 2023 Catalog: PDF p.32: PRB75, 5" × 20-1/8", 2-1/8", 75 sq ft. PDF p.47: C-4975 = PRB75. (PDF)
- Filbur Catalog & Reference Guide: PDF p.9 (printed p.17): FC-2395 = C-4975, 4-15/16" × 20-1/8", 2-1/8" open, 75 sq ft (PDF)
Not in sources: Center opening 2" (PDC) vs 2-1/8" (Unicel, Pleatco, Filbur). Diameter 5" (PDC, Pleatco) vs 4-15/16" (Unicel, Filbur). Not in Filbur’s PDC section or Unicel’s PDC block..
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