Pleatco PCD50N = Unicel C-7350 = Filbur FC-3963
50 sq ft hot tub filter, 7" diameter × 10-3/4" long. Top: Swivel Handle · Bottom: 2-11/16" open. Pleatco application: Caldera 50 (new style).
Interchangeable cartridges
- Unicel C-7350 confirmed by: Pleatco p.47 (Unicel to Pleatco cross reference) Unicel p.15 (Cartridges by series (dimensional listing))
- Filbur FC-3963 confirmed by: Pleatco p.48 (Filbur to Pleatco cross reference) Filbur p.33 (Reverse cross reference (Unicel to Filbur)) Filbur p.11 (Dimensional cartridge listing)
Published dimensions, side by side
Each manufacturer measures a little differently. Compare these with your old cartridge.
| As published by | Pleatco PCD50N source | Unicel C-7350 source | Filbur FC-3963 source |
|---|---|---|---|
| Outside diameter | 7" | 7" | 7" |
| Length | 10-3/4" | 10-3/4" | 10-3/4" |
| Top end | Swivel Handle | / semi-circular handle | Handle |
| Bottom end | 2-11/16" open | 2-11/16" / open | 2-11/16" open |
| Filter area | 50 sq ft | 50 sq ft | 50 sq ft |
| Pleats | not listed | 200 | not listed |
| Media weight | 3 oz/yd² | 3 oz/yd² | not listed |
Where to buy
Search any retailer for C-7350 or PCD50N or FC-3963. 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 |
|---|---|
1019401 | Pleatco p.33: OEM part # column Unicel p.30: OEM cross reference: Caldera Spas |
73532 | 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 1019401, 73532) Unicel p.30
FAQ
What is the Unicel equivalent of Pleatco PCD50N?
The catalogs cross-reference Pleatco PCD50N to Unicel C-7350.
What is the Filbur equivalent of Pleatco PCD50N?
The catalogs list Filbur FC-3963.
What size is the PCD50N filter?
Pleatco lists PCD50N as 7" outside diameter by 10-3/4" long, top: Swivel Handle, bottom: 2-11/16" open, 50 sq ft.
Which OEM part numbers does it replace?
Listed OEM numbers: 1019401, 73532.
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.