Pleatco PCS50N = Unicel C-8450 = Filbur FC-3310
50 sq ft hot tub filter, 8" diameter × 9" long. Top: 2-1/8" open · Bottom: 2" Slip. Pleatco application: Coleman Spas 50.
Interchangeable cartridges
- Unicel C-8450 confirmed by: Pleatco p.47 (Unicel to Pleatco cross reference) Unicel p.20 (Cartridges by series (dimensional listing))
- Filbur FC-3310 confirmed by: Pleatco p.48 (Filbur to Pleatco cross reference) Filbur p.33 (Reverse cross reference (Unicel to Filbur)) Filbur p.12 (Dimensional cartridge listing)
Published dimensions, side by side
Each manufacturer measures a little differently. Compare these with your old cartridge.
| As published by | Pleatco PCS50N source | Unicel C-8450 source | Filbur FC-3310 source |
|---|---|---|---|
| Outside diameter | 8" | 8" | 8" |
| Length | 9" | 9" | 9" |
| Top end | 2-1/8" open | 2-1/16" / open | 2-1/16" open |
| Bottom end | 2" Slip | / 2" male slip fitting | Male Slip |
| Filter area | 50 sq ft | 50 sq ft | 50 sq ft |
| Pleats | not listed | 193 | not listed |
| Media weight | 3 oz/yd² | 3 oz/yd² | not listed |
Where to buy
Search any retailer for C-8450 or PCS50N or FC-3310. 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.
- Coleman Spas (OEM 100593, 3301-2261) Unicel p.32
- Maax Spas of AZ (OEM 100593) Unicel p.44
FAQ
What is the Unicel equivalent of Pleatco PCS50N?
The catalogs cross-reference Pleatco PCS50N to Unicel C-8450.
What is the Filbur equivalent of Pleatco PCS50N?
The catalogs list Filbur FC-3310.
What size is the PCS50N filter?
Pleatco lists PCS50N as 8" outside diameter by 9" long, top: 2-1/8" open, bottom: 2" Slip, 50 sq ft.
Which OEM part numbers does it replace?
Listed OEM numbers: 100593, 3301-2261.
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.