Pleatco PSD125-2000 = Unicel C-8326 = Filbur FC-2780
125 sq ft hot tub filter, 8-1/2" diameter × 19" long. Top: 2-3/16 Slip · Bottom: 2-3/4" beveled edge. Pleatco application: Sundance Double End 120.
Interchangeable cartridges
- Unicel C-8326 confirmed by: Pleatco p.47 (Unicel to Pleatco cross reference) Unicel p.20 (Cartridges by series (dimensional listing))Unicel note: Note: Models dated before 2006 (contains a core block/plug).
- Filbur FC-2780 confirmed by: Pleatco p.48 (Filbur to Pleatco cross reference) Filbur p.33 (Reverse cross reference (Unicel to Filbur))
Published dimensions, side by side
Each manufacturer measures a little differently. Compare these with your old cartridge.
Where to buy
Search any retailer for C-8326 or PSD125-2000 or FC-2780. 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.
| OEM number | Listed in |
|---|---|
6540-488 | Pleatco p.35: OEM part # column Unicel p.59: OEM cross reference: Sundance Spas |
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.
- Sundance Spas (OEM 6540-488) Unicel p.59
FAQ
What is the Unicel equivalent of Pleatco PSD125-2000?
The catalogs cross-reference Pleatco PSD125-2000 to Unicel C-8326.
What is the Filbur equivalent of Pleatco PSD125-2000?
The catalogs list Filbur FC-2780.
What size is the PSD125-2000 filter?
Pleatco lists PSD125-2000 as 8-1/2" outside diameter by 19" long, top: 2-3/16 Slip, bottom: 2-3/4" beveled edge, 125 sq ft.
Which OEM part numbers does it replace?
Listed OEM numbers: 6540-488.
Sources: 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.