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PJ37-IN-4 spa filter equivalents
Part number PJ37-IN-4 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.
Jacuzzi C-5635 cartridge (OEM 42-3533-00-R), 5" (127 mm) × 13-5/16" (338 mm), 37 sq ft. Unicel C-5635, Pleatco PJ37-IN-4.
Unicel C-5635
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| OEM | 42-3533-00-R |
|---|---|
| Unicel | C-5635 |
| Pleatco | PJ37-IN-4 |
| Filbur | FC-1437 |
| Size | 5" (127 mm) × 13-5/16" (338 mm), 37 sq ft |
Sources
- Unicel 2026 Replacement Guide: OEM cross reference (Jacuzzi section), PDF p.41 (printed p.37); spec table PDF p.10 (printed p.6) (PDF)
- Filbur Catalog & Reference Guide: Product by Pool/Spa Manufacturer (OEM), Jacuzzi Whirlpool Spas, printed p.39 (PDF p.20) (PDF)
Not in sources: no model/model-year fitment in sources.
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