Pleatco PJW50 = Unicel C-5300 = Filbur FC-1320
50 sq ft hot tub filter, 5-11/16" diameter × 10-3/8" long. Top: Loop with String Handle · Bottom: 2-1/8" open. Pleatco application: Jacuzzi Whirlpool 50, C/top, Front Load.
Interchangeable cartridges
- Unicel C-5300 confirmed by: Pleatco p.47 (Unicel to Pleatco cross reference) Unicel p.11 (Cartridges by series (dimensional listing))
- Filbur FC-1320 confirmed by: Pleatco p.48 (Filbur to Pleatco cross reference) Filbur p.33 (Reverse cross reference (Unicel to Filbur)) Filbur p.10 (Dimensional cartridge listing)
Published dimensions, side by side
Each manufacturer measures a little differently. Compare these with your old cartridge.
| As published by | Pleatco PJW50 source | Unicel C-5300 source | Filbur FC-1320 source |
|---|---|---|---|
| Outside diameter | 5-11/16" | 5-11/16" | 5-11/16" |
| Length | 10-3/8" | 10-3/8" | 10-3/8" |
| Top end | Loop with String Handle | / closed w/ string loop | String Handle |
| Bottom end | 2-1/8" open | 2-1/8" / open | 2-1/8" open |
| Filter area | 50 sq ft | 50 sq ft | 50 sq ft |
| Pleats | not listed | 224 | not listed |
| Media weight | 3 oz/yd² | 3 oz/yd² | not listed |
Where to buy
Search any retailer for C-5300 or PJW50 or FC-1320. These are the same cartridge under different brand names.
Some links may be affiliate links. See our disclosure.
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.
- Clearwater Spas Unicel p.31
- Florida Whirlpool Unicel p.35
- Jacuzzi Whirlpool Bath (models: Aero, Alexa, Arrow Plus, Caressa,, Corsica, Dectra, Lazer II, Lexus LC,, Lexus Plus, Meridian II, Palio, Palio, Plus, Polara, Quantum, Quantum, Plus, Razza, Santina, Santina Plus,, Solaris, Solaris Plus, Tirage, Tirage, Plus, Vectra, Vectra II, Venterra,, 380</ti) Unicel p.42
- Seven Seas Unicel p.55
FAQ
What is the Unicel equivalent of Pleatco PJW50?
The catalogs cross-reference Pleatco PJW50 to Unicel C-5300.
What is the Filbur equivalent of Pleatco PJW50?
The catalogs list Filbur FC-1320.
What size is the PJW50 filter?
Pleatco lists PJW50 as 5-11/16" outside diameter by 10-3/8" long, top: Loop with String Handle, bottom: 2-1/8" open, 50 sq ft.
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.