Listing we opened and checked. Match the diameter, length and both fittings on this page before you order. The price is on Amazon; we do not print one.
6CH-940 spa filter equivalents
Part number 6CH-940 appears in 3 cross-reference rows 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.
Bullfrog 6CH-940 cartridge, 6" (152 mm) × 8-1/4" (210 mm), 50 sq ft. Unicel 6CH-940, Pleatco PWW50P3.
Unicel 6CH-940
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| OEM | |
|---|---|
| Unicel | 6CH-940 |
| Pleatco | PWW50P3 |
| Filbur | FC-0359 |
| Size | 6" (152 mm) × 8-1/4" (210 mm), 50 sq ft |
Sources
- Unicel 2026 Replacement Guide: OEM cross reference (Bullfrog section), PDF p.30 (printed p.26); spec table PDF p.12 (printed p.8) (PDF)
- Pleatco 2023 Catalog: Unicel-to-Pleatco cross reference, PDF p.47 (PDF)
- Filbur Catalog & Reference Guide: Product by Pool/Spa Manufacturer (OEM), Bullfrog, printed p.29 (PDF p.15) (PDF)
Not in sources: no model/model-year fitment in sources; Unicel lists no OEM part number for this brand entry.
Full details → · All Bullfrog spa filters · Which fitting you need · How to install it
Master Spas 6CH-940 cartridge, 6" (152 mm) × 8-1/4" (210 mm), 45 sq ft. Unicel 6CH-940, Pleatco PWW50P3.
Unicel 6CH-940 Listing we opened and checked. Match the diameter, length and both fittings on this page before you order. The price is on Amazon; we do not print one.
| OEM | |
|---|---|
| Unicel | 6CH-940 |
| Pleatco | PWW50P3 |
| Filbur | FC-0359 |
| Size | 6" (152 mm) × 8-1/4" (210 mm), 45 sq ft |
Sources
- Unicel 2026 Replacement Guide: OEM cross reference (Master Spas section), PDF p.45 (printed p.41); spec table PDF p.12 (printed p.8) (PDF)
- Pleatco 2023 Catalog: Unicel-to-Pleatco cross reference, PDF p.47 (PDF)
- Filbur Catalog & Reference Guide: Unicel-to-Filbur reverse cross reference, printed p.66 (PDF p.34) (PDF)
Not in sources: Unicel lists no OEM part number for this brand entry.
Full details → · All Master Spas spa filters · Which fitting you need · How to install it
Waterway Plastics 6CH-940 cartridge (OEM 817-0050), 6" (152 mm) × 8-1/4" (210 mm), 45 sq ft. Unicel 6CH-940, Pleatco PWW50P3.
Unicel 6CH-940 Listing we opened and checked. Match the diameter, length and both fittings on this page before you order. The price is on Amazon; we do not print one.
| OEM | 817-0050 |
|---|---|
| Unicel | 6CH-940 |
| Pleatco | PWW50P3 |
| Filbur | FC-0359 |
| Size | 6" (152 mm) × 8-1/4" (210 mm), 45 sq ft |
Sources
- Unicel 2026 Replacement Guide: Waterway list PDF p.64: 817-0050 = 6CH-940, 6" x 8-1/4", 50 sq ft, and a second line at 100 sq ft with two cartridges side by side. Spec table PDF p.12: 45 sq ft, 225 pleats, 1-1/2" SAE. Product list PDF p.61: 45 sq ft. (PDF)
- Waterway Plastics Service Logic cartridge table: Fetched 2026-11-09: 817-0050, 50SF, 6" x 8-1/4", F/A skimmer (web page)
- Pleatco 2023 Catalog: Spec table PDF p.33: PWW50P3, 6" x 7-5/8", 50 sq ft, OEM 817-0050. Cross-reference PDF p.47: 6CH-940 = PWW50P3. (PDF)
- Filbur Catalog & Reference Guide: Waterway Plastics section PDF p.28: FC-0359, OEM 817-0050, 6CH-940, sq ft column 40 (PDF)
Not in sources: Area 50 (Waterway table and Unicel Waterway line) vs 45 (Unicel spec table and Unicel product list) vs 40 (Filbur sq ft column). Length 8-1/4" vs Pleatco 7-5/8"..
Full details → · All Waterway Plastics spa filters · Which fitting you need · How to install it