Bullfrog OEM 10-1035 spa filter (8CH-950)

Bullfrog Spas

Replacement numbers

Unicel 8CH-950, Pleatco PBF35

Fits Bullfrog OEM 10-1035.

Diameter 8" (203 mm)Length 6" (152 mm)50 sq ft

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Unicel8CH-950
PleatcoPBF35
FilburFC-0536
Topsemi-circular handle
Bottom2" SAE thread
Ø 8" (203 mm)6" (152 mm)Side view · end views belowTopBottom
Top: semi-circular handle
Bottom: 2" SAE thread
Drawn to scale from the listed diameter and length. Handles, threads and closed ends are drawn as symbols, not to scale. 50 sq ft media.

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Bullfrog files this cartridge as 8CH-950 cartridge (OEM 10-1035), in the Bullfrog Spas group. Numbers on the row: OEM 10-1035; Unicel 8CH-950; Pleatco PBF35; Filbur FC-0536. 8" across, 6" long, top semi-circular handle, bottom 2" SAE thread, 50 sq ft.

What the sources add about 10-1035: Unicel: 8CH-950 discontinued, use 8CH-951. Pleatco 2023 cross-references 8CH-950 to PBF35, whose spec row lists OEM 10-2785 (Bullfrog 35, 2003-2012, short thread) rather than 10-1035.

Hold 8CH-950 next to 8CH-951 differs by Unicel 8CH-951, Pleatco PBF36, no Filbur number, 5-3/4" long, OEM 10-2870, note says Unicel: filtration area of the original cartridge is 35 sq ft; also replaces the Bullfrog 6" OAL element with shorter threaded end. Unicel's spec table rates 8CH-951 at 40 sq ft; PBF40 differs by no Unicel number, Pleatco PBF40, no Filbur number, 6-1/4" long, top 3-3/8" open (coreless), bottom 4-1/2" open (coreless), 30 sq ft, OEM 10-00282, note says Pleatco: Bullfrog 30 coreless, 2017-current. Leisure Time Inc. rates the OEM 10-00282 cartridge at 50 sq ft and notes 2013-2017 A/R/X spas need the Filter Core Cage & Cap Assembly; 2023-and-newer A Series use Simplicity flat filters; Leisure Time Inc.: Coreless cartridge; the correct filter cage and cap must be installed. 2023-and-newer A Series models use Simplicity flat filters..

Left blank on purpose: no model/model-year fitment in sources.

Source locations for this Bullfrog row: Unicel 2026 Replacement Guide on 8CH-950 (OEM cross reference (Bullfrog section), PDF p.30 (printed p.26); spec table PDF p.20 (printed p.16)). Pleatco 2023 Catalog on 8CH-950 (Unicel-to-Pleatco cross reference, PDF p.47). Filbur Catalog & Reference Guide on 8CH-950 (Product by Pool/Spa Manufacturer (OEM), Bullfrog, printed p.29 (PDF p.15)).

If you know the Bullfrog model and not the part number, use the Bullfrog filter by model and year lookup.

Check the cartridge you removed

Measure diameter, length, and both ends, then compare them with the figures above. The steps are in the measuring guide. Why the bottom decides whether it seals: open-end vs threaded filters. Power, the retainer, and not running the spa empty: how to install a cartridge. Brand notes: Bullfrog filters. Number formats: how Filbur, Unicel and Pleatco numbers compare.

Other Bullfrog cartridges

All 7 Bullfrog spa filters

Every number on this row, on one screen: cross-reference lookup. Published clean and replace intervals for this cartridge, and a buy link for the numbers above: replacement schedule and reorder. The interval comparison by brand: calculator.

Cleaner and test strips

Hose rinse and soak steps are in how to clean a cartridge. Named cleaners and strips are in filter cleaners and test strips.

Filter cleaner and test strips

Sources

Not in sources: no model/model-year fitment in sources.