Listing we opened and checked. Match the diameter, length and both fittings on this page before you order. The price is on Amazon; we do not print one.
373045 spa filter equivalents
Part number 373045 appears in 2 cross-reference rows 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-4326 cartridge (OEM 373045), 4-15/16" (125 mm) × 13-5/16" (338 mm), 25 sq ft. Unicel C-4326, Pleatco PRB25-IN.
Unicel C-4326
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| OEM | 373045 |
|---|---|
| Unicel | C-4326 |
| Pleatco | PRB25-IN |
| Filbur | FC-2375 |
| Size | 4-15/16" (125 mm) × 13-5/16" (338 mm), 25 sq ft |
Sources
- Unicel 2026 Replacement Guide: OEM cross reference (Jacuzzi section), PDF p.42 (printed p.38); spec table PDF p.9 (printed p.5) (PDF)
- Pleatco 2023 Catalog: Unicel-to-Pleatco cross reference, PDF p.47 (PDF)
- Filbur Catalog & Reference Guide: Unicel-to-Filbur reverse cross reference, printed p.64 (PDF p.33) (PDF)
Not in sources: no model/model-year fitment in sources.
Full details → · All Jacuzzi spa filters · Which fitting you need · How to install it
Jacuzzi C-4950 cartridge (OEM 373045), 4-15/16" (125 mm) × 13-5/16" (338 mm), 50 sq ft. Unicel C-4950, Pleatco PRB50-IN.
Unicel C-4950 Listing we opened and checked. Match the diameter, length and both fittings on this page before you order. The price is on Amazon; we do not print one.
| OEM | 373045 |
|---|---|
| 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: OEM cross reference (Jacuzzi section), PDF p.42 (printed p.38); spec table PDF p.9 (printed p.5) (PDF)
- Pleatco 2023 Catalog: Unicel-to-Pleatco cross reference, PDF p.47 (PDF)
- Filbur Catalog & Reference Guide: Product by Pool/Spa Manufacturer (OEM), Jacuzzi Premium Spas, printed p.40 (PDF p.21) (PDF)
Not in sources: no model/model-year fitment in sources.
Full details → · All Jacuzzi spa filters · Which fitting you need · How to install it