Pleatco PWW10 = Unicel C-4310 = Filbur FC-3077
10 sq ft hot tub filter, 4-1/4" diameter × 4" long. Top: 2-1/16" open · Bottom: 2-1/16" open. Pleatco application: Waterway Skim Filter 10.
Interchangeable cartridges
- Unicel C-4310 confirmed by: Pleatco p.47 (Unicel to Pleatco cross reference) Unicel p.6 (Cartridges by series (dimensional listing))
- Filbur FC-3077 confirmed by: Pleatco p.48 (Filbur to Pleatco cross reference) Filbur p.33 (Reverse cross reference (Unicel to Filbur)) Filbur p.8 (Dimensional cartridge listing)
Check before you order
- Filbur FC-3077 lists top opening 1-15/16" open vs 2-1/16" open.
- Filbur FC-3077 lists bottom opening 1-15/16" open vs 2-1/16" open.
Published dimensions, side by side
Each manufacturer measures a little differently. Compare these with your old cartridge.
| As published by | Pleatco PWW10 source | Unicel C-4310 source | Filbur FC-3077 source |
|---|---|---|---|
| Outside diameter | 4-1/4" | 4-1/4" | 4-1/4" |
| Length | 4" | 4" | 4" |
| Top end | 2-1/16" open | 2-1/16" / open | 1-15/16" open |
| Bottom end | 2-1/16" open | 2-1/16" / open | 1-15/16" open |
| Filter area | 10 sq ft | 10 sq ft | 10 sq ft |
| Pleats | not listed | 216 | not listed |
| Media weight | 3 oz/yd² | 3 oz/yd² | not listed |
Where to buy
Search any retailer for C-4310 or PWW10 or FC-3077. These are the same cartridge under different brand names.
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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.
- Accent Spas Unicel p.26
- Blue Falls Mfg. Ltd. (Canada) Unicel p.29
- Charisma Spas Unicel p.31
- Custom Molded Products (models: Front Access Skimmer; OEM 25249) Unicel p.33
- Hollibaugh Spas Unicel p.39
- Icon Spas (OEM 146949) Unicel p.39
- Leisure Bay Spas Unicel p.43
- PDC Spas Unicel p.47
- Rec Warehouse (OEM 378900) Unicel p.53
- Sonoma Spas Unicel p.56
- Superior Spas Unicel p.59
- Thermo Spas of Connecticut Unicel p.60
- US Tooling & Spa Unicel p.62
- Waterway Plastics (models: Skim filter 10 sq.ft.; OEM 817-0010) Unicel p.64
FAQ
What is the Unicel equivalent of Pleatco PWW10?
The catalogs cross-reference Pleatco PWW10 to Unicel C-4310.
What is the Filbur equivalent of Pleatco PWW10?
The catalogs list Filbur FC-3077.
What size is the PWW10 filter?
Pleatco lists PWW10 as 4-1/4" outside diameter by 4" long, top: 2-1/16" open, bottom: 2-1/16" open, 10 sq ft.
Which OEM part numbers does it replace?
Listed OEM numbers: 817-0010, 10146949, 25249, 378900, 146949.
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.