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Maax Spas OEM 108868 spa filter (5CH-25)
Maax Spas of AZ
Replacement numbers
Unicel 5CH-25, Pleatco PMAX25P4
Fits Maax Spas OEM 108868.
Diameter 5-5/8" (143 mm)Length 6" (152 mm)25 sq ft3 models listedSearch this part on Amazon
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| Unicel | 5CH-25 |
|---|---|
| Pleatco | PMAX25P4 (Spec table PDF p.32 and cross-reference PDF p.47: 5CH-25 = PMAX25P4, OEM 108868, 5-3/4" x 6", 1-1/2" MPT, 25 sq ft. Application index PDF p.27: Maax Spas 25 (1.50" MPT).) |
| Filbur | not found in Filbur catalog |
| Top | semi-circular handle |
| Bottom | 1-1/2" male thread/MPT |
Bottom: 1-1/2" male thread/MPT
Drawn to scale from the listed diameter and length. Handles, threads and closed ends are drawn as symbols, not to scale. 25 sq ft media.
Maax Spas of AZ is the group name on the Maax Spas row 5CH-25 cartridge (OEM 108868). Match these numbers: OEM 108868; Unicel 5CH-25; Pleatco PMAX25P4. 5-5/8" across, 6" long, top semi-circular handle, bottom 1-1/2" male thread/MPT, 25 sq ft.
Catalog note for 108868: Unicel's Maax Spas of AZ list puts Elegant, Intrigue and Joli on one cartridge: 25 sq ft, 5-5/8" x 6", 1-1/2" MPT, OEM 108868, 5CH-25. The spec table adds 201 pleats and 3 oz. Pleatco PMAX25P4 lists OEM 108868 at 5-3/4" x 6", still 25 sq ft and still 1-1/2" MPT. A text search of the Filbur catalog found no 5CH-25, no PMAX25 and no 108868.
5CH-25 (OEM 108868), Pleatco side: Spec table PDF p.32 and cross-reference PDF p.47: 5CH-25 = PMAX25P4, OEM 108868, 5-3/4" x 6", 1-1/2" MPT, 25 sq ft. Application index PDF p.27: Maax Spas 25 (1.50" MPT)..
108868, Filbur note: No 5CH-25, PMAX25 or 108868 row found in the Filbur catalog text..
Hot tubs named for 108868: Elegant, no year range printed, listed by Unicel 2026 Replacement Guide (OEM 108868, 25 sq ft, on the same line as Intrigue and Joli); Intrigue, no year range printed, listed by Unicel 2026 Replacement Guide (Same cartridge as Elegant and Joli); Joli, no year range printed, listed by Unicel 2026 Replacement Guide (Same cartridge as Elegant and Intrigue. Not the Elite cartridge.).
5CH-25 is easy to confuse on the Maax Spas table. 5CH-35 differs by Unicel 5CH-35, Pleatco PMAX50P4, Filbur FC-0300, 8" long, 35 sq ft, OEM 104309, note says Unicel's Maax of AZ line names Elite Spas on OEM 104309, 5CH-35, 35 sq ft, 5-5/8" x 8", 1-1/2" MPT. The spec table agrees: 203 pleats, 3 oz, 35 sq ft. A separate heading, Elite Spas by Maax, prints 50 sq ft for the same diameter, length, thread and Unicel number, and prints no OEM. Pleatco's cross-reference sends 5CH-35 to PMAX50P4, specified at 5-3/4" x 8", 50 sq ft, for Maax Spas of Canada, with no OEM. Pleatco also prints PAS35P4 for Elite Spas (Coleman) at 5-7/8" x 7-3/4", 35 sq ft, with no OEM. Filbur FC-0300 is 5-5/8" x 8", 35 sq ft, and its Pleatco cell is PAS35P. The square feet stored here are the spec table's 35. PMAX50P4 is not that 35 sq ft cartridge.. C-4950 differs by Unicel C-4950, Pleatco PRB50-IN, Filbur FC-2390, 4-15/16" diameter, 13-5/16" long, top 2-1/8" / open, bottom 2-1/8" / open, 50 sq ft, OEM 100533, note says Maax of AZ prints OEM 100533 on a 50 sq ft, 4-15/16" x 13-5/16" line and names no model. The heading says see also Coleman Spas. Coleman's block pairs 100533 with 3301-2145. This Maax row does not add the 3301 number, because Unicel does not print it under Maax. Pleatco's outside diameter for PRB50-IN is 5"..
Filbur does not have a number on this row. Search 108868 or the Maax Spas part you pulled out of the spa.
Left blank on purpose: Diameter 5-5/8" (Unicel) versus 5-3/4" (Pleatco). No Filbur equivalent found..
Pages checked for 108868: Unicel 2026 Replacement Guide on 5CH-25 (Maax Spas of AZ, PDF p.44 (printed p.40): Elegant, Intrigue and Joli = 108868 = 5CH-25, 25 sq ft, 5-5/8" x 6", 1-1/2" MPT. Spec table PDF p.11 (printed p.7): 201 pleats, 3 oz, 25 sq ft.). Pleatco 2023 Catalog on 5CH-25 (Spec table PDF p.32: PMAX25P4, OEM 108868, 5-3/4" x 6", 1-1/2" MPT, 25 sq ft. Cross-reference PDF p.47: 5CH-25 = PMAX25P4.).
Hot tubs listed for this cartridge
The rest of the Maax Spas model list is the Maax Spas filter by model and year lookup.
| Model / system | Years | Listed by |
|---|---|---|
| Elegant (OEM 108868, 25 sq ft, on the same line as Intrigue and Joli) | not given | Unicel 2026 Replacement Guide |
| Intrigue (Same cartridge as Elegant and Joli) | not given | Unicel 2026 Replacement Guide |
| Joli (Same cartridge as Elegant and Intrigue. Not the Elite cartridge.) | not given | Unicel 2026 Replacement Guide |
Check the cartridge you removed
Measure diameter, length, and both ends, then compare them with the figures above. The steps are in the measuring guide. Why the bottom decides whether it seals: open-end vs threaded filters. Power, the retainer, and not running the spa empty: how to install a cartridge. Number formats: how Filbur, Unicel and Pleatco numbers compare.
Other Maax Spas cartridges
- 5CH-35 cartridge (OEM 104309), 5-5/8" (143 mm) × 8" (203 mm)
- C-4950 cartridge (OEM 100533), 4-15/16" (125 mm) × 13-5/16" (338 mm)
- C-5374 cartridge (OEM 107092), 5-5/16" (135 mm) × 14-13/16" (376 mm)
- C-8450 cartridge (OEM 100593), 8" (203 mm) × 9" (229 mm)
- C-8475 cartridge (OEM 100594), 8" (203 mm) × 13" (330 mm)
Every number on this row, on one screen: cross-reference lookup. Published clean and replace intervals for this cartridge, and a buy link for the numbers above: replacement schedule and reorder. The interval comparison by brand: calculator.
Cleaner and test strips
Hose rinse and soak steps are in how to clean a cartridge. Named cleaners and strips are in filter cleaners and test strips.
Filter cleaner and test strips
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Leisure Time O Filter Clean Cartridge Cleaner Listing title: cartridge cleaner, 32 fl oz.
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SpaGuard Filter Cleaner Listing title: filter cleaner for spas and hot tubs, 1 quart.
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AquaChek SPA 6-in-1 Test Strips Listing title: reads total bromine, total chlorine, free chlorine, pH, total alkalinity and total hardness.
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Sources
- Unicel 2026 Replacement Guide: Maax Spas of AZ, PDF p.44 (printed p.40): Elegant, Intrigue and Joli = 108868 = 5CH-25, 25 sq ft, 5-5/8" x 6", 1-1/2" MPT. Spec table PDF p.11 (printed p.7): 201 pleats, 3 oz, 25 sq ft. (PDF)
- Pleatco 2023 Catalog: Spec table PDF p.32: PMAX25P4, OEM 108868, 5-3/4" x 6", 1-1/2" MPT, 25 sq ft. Cross-reference PDF p.47: 5CH-25 = PMAX25P4. (PDF)
Not in sources: Diameter 5-5/8" (Unicel) versus 5-3/4" (Pleatco). No Filbur equivalent found..