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370-0699 spa filter equivalents
Part number 370-0699 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.
Marquis Spas 5CH-512 cartridge (OEM 20690), 5-3/16" (132 mm) × 16" (406 mm), 50 sq ft. Unicel 5CH-512, Pleatco not listed.
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| OEM | 20690 |
|---|---|
| Unicel | 5CH-512 |
| Pleatco | not listed |
| Filbur | not listed |
| Size | 5-3/16" (132 mm) × 16" (406 mm), 50 sq ft |
Sources
- Unicel 2026 Replacement Guide: OEM cross reference (Marquis Spas section), PDF p.44 (printed p.40); spec table PDF p.10 (printed p.6) (PDF)
- Marquis Spas (manufacturer filter finder): Filter Finder (series, model years, slip-on/threaded, sq ft, part number): Crown Series 2021 and newer, threaded 50, 20690; Elite 2020 and newer and Celebrity Series Elite 2018–2019, threaded 50, 20690 (web page)
- Canada Hot Tub Parts (Marquis parts dealer): Marquis 20690: 5-3/16" x 16", handle top, 2" threaded MPT, 50 sq ft; for Celebrity Elite and V150 Select models (web page)
- Hot Spring Supply (retailer): Marquis Crown Collection 2021 threaded 50 sq ft filter 20690: 5-3/16" x 16", handle, 2" MPT; used on some Celebrity Elite and V150 models (web page)
Not in sources: no Pleatco or Filbur equivalent found in either catalog; 2026 Crown owner's manual describes a 35 sq ft filter, not the finder's 50 sq ft 20690.
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