Unicel 5CH-502 Replacement Filter Cartridge | 50 sq. ft. | Marquis Spas & Cal Spas
- In stock, ready to ship
- SKU:
- 5CH-502
-
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About This Item
The Unicel 5CH-502 is a 50 sq. ft. replacement spa filter cartridge engineered with a bar handle top and 2" male pipe thread (MPT) bottom — built to the precise dimensional envelope of the original for a confident drop-in fit. With 197 pleats of 3 oz. Reemay 2033 polyester media, the 5CH-502 delivers consistent particulate capture and reliable water clarity through every filter cycle.
Specifications
| Filter Area | 50 sq. ft. |
| Length | 12 1/2" |
| Outer Diameter | 5 3/16" |
| Top Inner Diameter | N/A |
| Bottom Inner Diameter | N/A |
| Material | 3 oz. Reemay 2033 |
| Pleat Count | 197 |
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Top Cap: bar handle
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Bottom Cap: 2" male thread/MPT
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Note from Unicel: If your existing cartridge is labeled C-5303, the 5CH-502 is its current replacement. The 5CH-502 is the updated Unicel part number for this filter.
Fits into:
| OEM Brand | Product Name | Part Number | Notes |
| Cal Spas | — | FIL11100202 | — |
| Marquis Spas | — | 20041 | New design filter housing |
| Marquis Spas | — | 370-0237 | New design filter housing |
| Marquis Spas | — | 20091 | New design filter housing |
⚠️ Marquis Spas Owners: The 5CH-502 fits the new design Marquis filter housing. If your current cartridge carries a part number other than 20041, 370-0237, or 20091, verify your housing design before ordering to ensure a correct fit.
(This is not an exhaustive list.)
Pro Tip: Before ordering, measure your existing cartridge's length and outer diameter against the specs above — 12 1/2" length and 5 3/16" OD are the key fit dimensions for the 5CH-502. Confirm the 2" MPT thread on the bottom cap matches your filter housing connection.
