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FLT-SWIM50-CART spa filter equivalents
Part number FLT-SWIM50-CART 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 4CH-949 cartridge (OEM FLT-SWIM50-CART), 4-15/16" (125 mm) × 13-1/2" (343 mm), 50 sq ft. Unicel 4CH-949, Pleatco PWW50L.
Unicel 4CH-949
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| OEM | FLT-SWIM50-CART |
|---|---|
| Unicel | 4CH-949 |
| Pleatco | PWW50L |
| Filbur | FC-0172 |
| Size | 4-15/16" (125 mm) × 13-1/2" (343 mm), 50 sq ft |
Sources
- PDC Spas (manufacturer filter guide, 2025): Synergy, Summit, Splash, Vitality, and the hot-tub zone of dual-zone models, 2009–present: FLT-SWIM50-CART, 50 sq ft, 5" × 13-1/16", 1-1/2" female SAE (38 mm), Unicel 4CH-949 (PDF)
- Unicel 2026 Replacement Guide: Spec table PDF p.9 (printed p.5): 4CH-949, 4-15/16" × 13-1/2", 210 pleats, 3 oz, 50 sq ft, 2" female SAE, note for a 1-1/2" male SAE standpipe. Waterway line: 817-4050 = 4CH-949. (PDF)
- Pleatco 2023 Catalog: PDF p.32: PWW50L, 5" × 13-3/16", 1-1/2" female SAE, 50 sq ft. PDF p.47: 4CH-949 = PWW50L. (PDF)
- Filbur Catalog & Reference Guide: PDF p.9 (printed p.17): FC-0172 = 4CH-949, 13-1/2", 2" female SAE, 50 sq ft (PDF)
Not in sources: Length 13-1/16" (PDC) vs 13-3/16" (Pleatco) vs 13-1/2" (Unicel, Filbur). Thread wording: PDC and Pleatco 1-1/2" female SAE; Unicel and Filbur 2" female SAE, with Unicel’s note that it fits a 1-1/2" male SAE standpipe. Diameter 5" (PDC, Pleatco) vs 4-15/16" (Unicel, Filbur). Not in Filbur’s PDC section..
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