Pleatco PCD50 = Unicel C-7451 = Filbur FC-3084
50 sq ft hot tub filter, 7" diameter × 10-3/4" long. Top: Swivel Handle · Bottom: 2" Male Slip. Pleatco application: Caldera 50.
Interchangeable cartridges
- Unicel C-7451 confirmed by: Pleatco p.47 (Unicel to Pleatco cross reference) Unicel p.15 (Cartridges by series (dimensional listing))Unicel note: Note: C-7350 can also be used as a replacement.
- Filbur FC-3084 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-7451 or PCD50 or FC-3084. 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 |
|---|---|
033016 | Pleatco p.33: OEM part # column Unicel p.30: OEM cross reference: Caldera 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.
- Caldera Spas (OEM 033016) Unicel p.30
FAQ
What is the Unicel equivalent of Pleatco PCD50?
The catalogs cross-reference Pleatco PCD50 to Unicel C-7451.
What is the Filbur equivalent of Pleatco PCD50?
The catalogs list Filbur FC-3084.
What size is the PCD50 filter?
Pleatco lists PCD50 as 7" outside diameter by 10-3/4" long, top: Swivel Handle, bottom: 2" Male Slip, 50 sq ft.
Which OEM part numbers does it replace?
Listed OEM numbers: 033016.
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.