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3005820 spa filter equivalents
Part number 3005820 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.
Beachcomber C-4401 cartridge (SKU 3005820), 4-15/16" (125 mm) × 4-5/8" (117 mm), 35 sq ft. Unicel C-4401, Pleatco PRB17.5SF-PAIR.
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| OEM | 3005820 |
|---|---|
| Unicel | C-4401 |
| Pleatco | PRB17.5SF-PAIR |
| Filbur | FC-2386 |
| Size | 4-15/16" (125 mm) × 4-5/8" (117 mm), 35 sq ft |
Sources
- Beachcomber Hot Tubs (manufacturer product page): SKU 3005820: 35 sq ft, two pieces, blue stem installed first, generally pre-1995 upfront weir; no length printed (web page)
- Unicel 2026 Replacement Guide: Beachcomber OEM cross-reference, PDF p.29 (printed p.25): 3005820 = C-4401, 4-15/16" x 4-5/8", 35 sq ft, 4 oz; spec table PDF p.8 (printed p.4): 158 pleats, 2-1/8" open, two per set with stick handle (PDF)
- Pleatco 2023 Catalog: Unicel-to-Pleatco cross reference, PDF p.47; spec table PDF p.31 (5" OD) (PDF)
- Filbur Catalog & Reference Guide: Beachcomber Spas, PDF p.15: FC-2386 = C-4401, 4-15/16" x 4-5/8", 2/set, 35 sq ft (PDF)
Not in sources: Beachcomber prints no length; Pleatco outside diameter is 5" and its JH-PAIR bottom hole is 2-3/16" rather than 2-1/8".
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