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817-5000 spa filter equivalents
Part number 817-5000 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.
Waterway Plastics C-4950 cartridge (OEM 817-5000), 4-15/16" (125 mm) × 13-5/16" (338 mm), 50 sq ft. Unicel C-4950, Pleatco PRB50-IN.
Unicel C-4950
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| OEM | 817-5000 |
|---|---|
| Unicel | C-4950 |
| Pleatco | PRB50-IN |
| Filbur | FC-2390 |
| Size | 4-15/16" (125 mm) × 13-5/16" (338 mm), 50 sq ft |
Sources
- Unicel 2026 Replacement Guide: Waterway list PDF p.64: 817-5000 = C-4950, 4-15/16" x 13-5/16", 50 sq ft. Spec table PDF p.9: 212 pleats, and the note that C-4950 is an upgrade of C-4326. (PDF)
- Waterway Plastics Service Logic cartridge table: Fetched 2026-11-09: 817-5000, 50 sq ft, in-line top-load (web page)
- Pleatco 2023 Catalog: Spec table PDF p.32: PRB50-IN includes OEM 817-5000, 5" x 13-5/16", 50 sq ft (PDF)
- Filbur Catalog & Reference Guide: Waterway section PDF p.28: FC-2390, OEM 817-5000, C-4950, 50 sq ft (PDF)
Not in sources: Outside diameter 4-15/16" (Unicel, Filbur) vs 5" (Pleatco)..
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