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PMAX50P4 spa filter equivalents
Part number PMAX50P4 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.
Maax Spas 5CH-35 cartridge (OEM 104309), 5-5/8" (143 mm) × 8" (203 mm), 35 sq ft. Unicel 5CH-35, Pleatco PMAX50P4.
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| OEM | 104309 |
|---|---|
| Unicel | 5CH-35 |
| Pleatco | PMAX50P4 |
| Filbur | FC-0300 |
| Size | 5-5/8" (143 mm) × 8" (203 mm), 35 sq ft |
Sources
- Unicel 2026 Replacement Guide: Maax Spas of AZ PDF p.44: Elite Spas, 104309, 5CH-35, 35 sq ft, 5-5/8" x 8", 1-1/2" MPT. Spec table PDF p.11: 203 pleats, 35 sq ft. Heading Elite Spas by Maax, PDF p.34 (printed p.30): 50 sq ft, same body, no OEM. (PDF)
- Pleatco 2023 Catalog: PDF p.47: 5CH-35 = PMAX50P4. PDF p.32: PMAX50P4 at 50 sq ft (Maax of Canada) and PAS35P4 at 35 sq ft (Elite Spas, Coleman), 5-7/8" x 7-3/4". (PDF)
- Filbur Catalog & Reference Guide: FC-0300, PDF p.16 and p.18: 5-5/8" x 8", 35 sq ft, PAS35P, 5CH-35, Elite Spa by Coleman / Maax/Coleman Spas (PDF)
Not in sources: Unicel prints 35 sq ft on the spec table and the Maax of AZ line (with OEM 104309) and 50 sq ft on the Elite Spas by Maax heading (no OEM). Pleatco's cross-reference number PMAX50P4 is 50 sq ft. PAS35P4 is 35 sq ft at 5-7/8" x 7-3/4". Filbur is 35 sq ft and does not print OEM 104309..
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