Pleatco PBF36 = Unicel 8CH-951
35 sq ft hot tub filter, 8" diameter × 5-7/8" long. Top: Handle · Bottom: 2" modified ACME(long). Pleatco application: Bullfrog 35, 2013-2017 (long thread).
Interchangeable cartridges
- Unicel 8CH-951 confirmed by: Pleatco p.47 (Unicel to Pleatco cross reference) Unicel p.20 (Cartridges by series (dimensional listing))Unicel note: Note: Also replaces Bullfrog 6" OAL filter element w/ shorter threaded end.
Check before you order
- Unicel 8CH-951 describes the bottom thread as '/ 2" SAE thread' vs '2" modified ACME(long)'; check your thread type.
- Unicel 8CH-951 rates it 40 sq ft (vs 35 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 8CH-951 or PBF36. 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 |
|---|---|
10-2870 | Pleatco p.35: OEM part # column Unicel p.30: OEM cross reference: Bullfrog 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.
- Bullfrog Spas (OEM 10-2870) Unicel p.30
FAQ
What is the Unicel equivalent of Pleatco PBF36?
The catalogs cross-reference Pleatco PBF36 to Unicel 8CH-951.
What is the Filbur equivalent of Pleatco PBF36?
We did not find a Filbur equivalent for Pleatco PBF36 in the manufacturer catalogs.
What size is the PBF36 filter?
Pleatco lists PBF36 as 8" outside diameter by 5-7/8" long, top: Handle, bottom: 2" modified ACME(long), 35 sq ft.
Which OEM part numbers does it replace?
Listed OEM numbers: 10-2870.
Sources: Pleatco 2023 Catalog & Cross Reference Guide (Pentair) · Pleatco 2023 Catalog & Cross Reference Guide (Pentair) · Unicel 2026 Replacement Guide. Last checked 2026-10-21.