Bullfrog OEM 10-00281 spa filter (PBF17)

Bullfrog STIL Series (coreless)

Replacement numbers

Pleatco PBF17

Fits Bullfrog OEM 10-00281.

Diameter 6-5/8" (168 mm)Length 6-1/4" (159 mm)18 sq ft1 model listed

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Unicelnot listed in Unicel 2026 guide
PleatcoPBF17
Filburnot found in Filbur catalog
Top3-3/8" (86 mm) open (coreless)
Bottom4-1/2" (114 mm) open (coreless)
Ø 6-5/8" (168 mm)6-1/4" (159 mm)Side view · end views belowTopBottom
Top: 3-3/8" (86 mm) open (coreless)
Bottom: 4-1/2" (114 mm) open (coreless)
Drawn to scale from the listed diameter and length and open-end sizes. Handles, threads and closed ends are drawn as symbols, not to scale. 18 sq ft media.

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Bullfrog STIL Series (coreless) is the group name on the Bullfrog row PBF17 cartridge (OEM 10-00281). Match these numbers: OEM 10-00281; Pleatco PBF17. 6-5/8" across, 6-1/4" long, top 3-3/8" open (coreless), bottom 4-1/2" open (coreless), 18 sq ft.

Catalog note for 10-00281: Pleatco: Bullfrog 18 coreless, 2017-current. Leisure Time Inc. rates the OEM 10-00281 cartridge at approximately 27 sq ft and notes 2015-2017 STIL spas need Filter Core Cage & Cap Assembly 10-00417; Leisure Time Inc.: Coreless cartridge; the correct filter cage and cap must be installed.

Hot tubs named for 10-00281: Bullfrog STIL Series, years 2018–2026, listed by Leisure Time Inc. dealer listing.

PBF17 is easy to confuse on the Bullfrog table. PBF40 differs by Pleatco PBF40, 8" diameter, 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.. 8CH-950 differs by Unicel 8CH-950, Pleatco PBF35, Filbur FC-0536, 8" diameter, 6" long, top semi-circular handle, bottom 2" SAE thread, 50 sq ft, OEM 10-1035, note says 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.

Unicel and Filbur do not have a number on this row. Search 10-00281 or the Bullfrog part you pulled out of the spa.

Left blank on purpose: no Unicel equivalent in Unicel 2026 guide; no Filbur equivalent found; sq ft rating differs between Pleatco and Leisure Time.

Pages checked for 10-00281: Pleatco 2023 Catalog on PBF17 (spec table, PDF p.33 (OEM 10-00281)). Leisure Time Inc. on PBF17 (Product page: OEM number, model list and years).

Hot tubs listed for this cartridge

The rest of the Bullfrog model list is the Bullfrog filter by model and year lookup.

Model / systemYearsListed by
Bullfrog STIL Series2018–2026Leisure Time Inc. dealer listing

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 Unicel equivalent in Unicel 2026 guide; no Filbur equivalent found; sq ft rating differs between Pleatco and Leisure Time.