Pleatco PRB14.5 = Unicel C-2302 = Filbur FC-2320
15 sq ft hot tub filter, 2-7/8" diameter × 17-1/16" long. Top: 1-1/16" open · Bottom: 1-1/16" open. Pleatco application: Rainbow Hi Flow 14.5.
Interchangeable cartridges
- Unicel C-2302 confirmed by: Pleatco p.47 (Unicel to Pleatco cross reference) Unicel p.5 (Cartridges by series (dimensional listing))
- Filbur FC-2320 confirmed by: Pleatco p.48 (Filbur to Pleatco cross reference) Filbur p.33 (Reverse cross reference (Unicel to Filbur))
Check before you order
- Unicel C-2302 rates it 14.5 sq ft (vs 15 sq ft); filter area ratings differ by maker.
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-2302 or PRB14.5 or FC-2320. 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 |
|---|---|
17-0051 | Pleatco p.31: OEM part # column Unicel p.52: OEM cross reference: Pentair Pool Prod - Rainbow Plastics |
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.
- Emerald Spas Unicel p.34
- Pentair Pool Prod - Rainbow Plastics (models: Hi Flow cartridge; OEM 17-0051) Unicel p.52
FAQ
What is the Unicel equivalent of Pleatco PRB14.5?
The catalogs cross-reference Pleatco PRB14.5 to Unicel C-2302.
What is the Filbur equivalent of Pleatco PRB14.5?
The catalogs list Filbur FC-2320.
What size is the PRB14.5 filter?
Pleatco lists PRB14.5 as 2-7/8" outside diameter by 17-1/16" long, top: 1-1/16" open, bottom: 1-1/16" open, 15 sq ft.
Which OEM part numbers does it replace?
Listed OEM numbers: 17-0051.
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.