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73722 spa filter equivalents
Part number 73722 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.
Caldera C-8399 cartridge (OEM 1039607), 8" (203 mm) × 16-1/2" (419 mm), 100 sq ft. Unicel C-8399, Pleatco PCD100W.
Unicel C-8399
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| OEM | 1039607 |
|---|---|
| Unicel | C-8399 |
| Pleatco | PCD100W |
| Filbur | FC-3965 |
| Size | 8" (203 mm) × 16-1/2" (419 mm), 100 sq ft |
Sources
- Unicel 2026 Replacement Guide: OEM cross reference (Caldera section), PDF p.30 (printed p.26); spec table PDF p.20 (printed p.16) (PDF)
- Pleatco 2023 Catalog: Unicel-to-Pleatco cross reference, PDF p.47 (PDF)
- Filbur Catalog & Reference Guide: Product by Pool/Spa Manufacturer (OEM), Caldera, printed p.30 (PDF p.16) (PDF)
- Leisure Time Inc. (Hot Spring/Caldera dealer): Compatibility section: model and model-year list (web page)
- Leisure Time Inc. (Hot Spring/Caldera dealer): Compatibility section: model and model-year list (web page)
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