Pleatco PWW50P3 = Unicel 6CH-940 = Filbur FC-0359
50 sq ft hot tub filter, 6" diameter × 7-5/8" long. Top: Handle · Bottom: 1-1/2" SAE. Pleatco application: Waterway Front Access Skimmer (2 required).
Interchangeable cartridges
- Unicel 6CH-940 confirmed by: Pleatco p.47 (Unicel to Pleatco cross reference) Unicel p.12 (Cartridges by series (dimensional listing))
- Filbur FC-0359 confirmed by: Pleatco p.48 (Filbur to Pleatco cross reference) Filbur p.34 (Reverse cross reference (Unicel to Filbur)) Filbur p.13 (Dimensional cartridge listing)
Check before you order
- Unicel 6CH-940 lists length 8-1/4" vs 7-5/8"; measure before ordering.
- Unicel 6CH-940 rates it 45 sq ft (vs 50 sq ft); filter area ratings differ by maker.
- Filbur FC-0359 lists length 8-1/4" vs 7-5/8"; measure before ordering.
- Filbur FC-0359 rates it 40 sq ft (vs 50 sq ft); filter area ratings differ by maker.
Published dimensions, side by side
Each manufacturer measures a little differently. Compare these with your old cartridge.
| As published by | Pleatco PWW50P3 source | Unicel 6CH-940 source | Filbur FC-0359 source |
|---|---|---|---|
| Outside diameter | 6" | 6" | 6" |
| Length | 7-5/8" | 8-1/4" | 8-1/4" |
| Top end | Handle | / semi-circular handle | Handle |
| Bottom end | 1-1/2" SAE | / injection molded 1-1/2" SAE thread | 6 x 8-1/4; Male SAE Thread |
| Filter area | 50 sq ft | 45 sq ft | 40 sq ft |
| Pleats | not listed | 225 | not listed |
| Media weight | 3 oz/yd² | 3 oz/yd² | not listed |
Where to buy
Search any retailer for 6CH-940 or PWW50P3 or FC-0359. These are the same cartridge under different brand names.
Some links may be affiliate links. See our disclosure.
OEM part numbers this cartridge replaces
As printed in the cited aftermarket catalogs. Match the number on your old cartridge or in your spa manual exactly.
Hot tub brands that use it
From the spa-manufacturer cross reference in the Unicel 2026 Replacement Guide. A brand may use several sizes, so check your measurements.
- Aber Hot Tubs (Canada) (OEM 03FIL1400) Unicel p.26
- American Spas Unicel p.27
- Apollo Spas Unicel p.27
- Arcadia Spas Unicel p.28
- Atera Spas (Four Seasons Home Resort Products) Unicel p.29
- Belize Spas Unicel p.29
- Blue Pacific Spas Unicel p.30
- Bullfrog Spas Unicel p.30
- Canspa Mfg. (Canada) Unicel p.31
- Catalina Spas Unicel p.31
- Charisma Spas Unicel p.31
- Clearwater Spas Unicel p.31
- Custom Molded Products (models: Single Port Front Access Skim, Double Port Front Access Skim; OEM 25252) Unicel p.33
- Dakota Spas Unicel p.33
- Dynasty Spas Unicel p.34
- Gulf Coast Spas Unicel p.36
- H2O Spas Unicel p.36
- Haven Spas Unicel p.37
- Hawkeye Spas Unicel p.37
- Infinity Spas - TN Unicel p.40
- Islander Spas Unicel p.41
- Leisure Bay Spas Unicel p.43
- Master Spas Unicel p.45
- Millennium Spas Unicel p.45
- Passion Spas Unicel p.47
- Phoenix Spas Unicel p.53
- Rec Warehouse (OEM 378902) Unicel p.53
- Santa Barbara Spas Unicel p.54
- Spas Direct Unicel p.56
- Sunbelt Spas Unicel p.58
- Sunrise Spas Unicel p.59
- Superior Spas Unicel p.59
- Thermo Spas of Connecticut Unicel p.60
- Tuff Spas Unicel p.60
- Viking Spas Unicel p.63
- Vita Spas (OEM PWW 50) Unicel p.63
- Waterway Plastics (models: Front Access Skim Filter; OEM 817-0050) Unicel p.64
FAQ
What is the Unicel equivalent of Pleatco PWW50P3?
The catalogs cross-reference Pleatco PWW50P3 to Unicel 6CH-940.
What is the Filbur equivalent of Pleatco PWW50P3?
The catalogs list Filbur FC-0359.
What size is the PWW50P3 filter?
Pleatco lists PWW50P3 as 6" outside diameter by 7-5/8" long, top: Handle, bottom: 1-1/2" SAE, 50 sq ft.
Which OEM part numbers does it replace?
Listed OEM numbers: 817-0050, 03FIL1400, 25252, 378902.
Sources: Filbur Product Catalog and Reference Guide (2024) · Filbur Product Catalog and Reference Guide (2024) · Pleatco 2023 Catalog & Cross Reference Guide (Pentair) · Pleatco 2023 Catalog & Cross Reference Guide (Pentair) · Pleatco 2023 Catalog & Cross Reference Guide (Pentair) · Unicel 2026 Replacement Guide. Last checked 2026-10-21.