Listing we opened and checked. Match the diameter, length and both fittings on this page before you order. The price is on Amazon; we do not print one.
Bullfrog OEM 10-2870 spa filter (8CH-951)
Bullfrog Spas
Replacement numbers
Unicel 8CH-951, Pleatco PBF36
Fits Bullfrog OEM 10-2870.
Diameter 8" (203 mm)Length 5-3/4" (146 mm)50 sq ft1 model listedUnicel 8CH-951
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| Unicel | 8CH-951 |
|---|---|
| Pleatco | PBF36 |
| Filbur | not found in Filbur catalog |
| Top | semi-circular handle |
| Bottom | 2" SAE thread |
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.
Bullfrog files this cartridge as 8CH-951 cartridge (OEM 10-2870), in the Bullfrog Spas group. Numbers on the row: OEM 10-2870; Unicel 8CH-951; Pleatco PBF36. 8" across, 5-3/4" long, top semi-circular handle, bottom 2" SAE thread, 50 sq ft.
10-2870 carries this note from the catalogs: 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.
Bullfrog applications recorded for this cartridge: Bullfrog 35 filter (long thread), years 2013–2017, listed by Pleatco 2023 Catalog.
Before ordering 8CH-951, compare it with 8CH-950 differs by Unicel 8CH-950, Pleatco PBF35, Filbur FC-0536, 6" long, 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; and PBF40 differs by no Unicel number, Pleatco PBF40, 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..
Filbur does not have a number on this row. Search 10-2870 or the Bullfrog part you pulled out of the spa.
Left blank on purpose: no Filbur equivalent found in Filbur catalog.
Pages checked for 10-2870: Unicel 2026 Replacement Guide on 8CH-951 (OEM cross reference (Bullfrog section), PDF p.30 (printed p.26); spec table PDF p.20 (printed p.16)). Pleatco 2023 Catalog on 8CH-951 (Unicel-to-Pleatco cross reference, PDF p.47). Pleatco 2023 Catalog on 8CH-951 (spec table, PDF p.35 (PBF36: OEM 10-2870, Bullfrog 35, 2013-2017, long thread)).
Hot tubs listed for this cartridge
The rest of the Bullfrog model list is the Bullfrog filter by model and year lookup.
| Model / system | Years | Listed by |
|---|---|---|
| Bullfrog 35 filter (long thread) | 2013–2017 | Pleatco 2023 Catalog |
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
- 8CH-950 cartridge (OEM 10-1035), 8" (203 mm) × 6" (152 mm)
- PBF40 cartridge (OEM 10-00282), 8" (203 mm) × 6-1/4" (159 mm)
- PBF17 cartridge (OEM 10-00281), 6-5/8" (168 mm) × 6-1/4" (159 mm)
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
-
Leisure Time O Filter Clean Cartridge Cleaner Listing title: cartridge cleaner, 32 fl oz.
-
SpaGuard Filter Cleaner Listing title: filter cleaner for spas and hot tubs, 1 quart.
-
AquaChek SPA 6-in-1 Test Strips Listing title: reads total bromine, total chlorine, free chlorine, pH, total alkalinity and total hardness.
Unicel 8CH-951 Listing we opened and checked. Match the diameter, length and both fittings on this page before you order. The price is on Amazon; we do not print one.
Sources
- Unicel 2026 Replacement Guide: OEM cross reference (Bullfrog section), PDF p.30 (printed p.26); spec table PDF p.20 (printed p.16) (PDF)
- Pleatco 2023 Catalog: Unicel-to-Pleatco cross reference, PDF p.47 (PDF)
- Pleatco 2023 Catalog: spec table, PDF p.35 (PBF36: OEM 10-2870, Bullfrog 35, 2013-2017, long thread) (PDF)
Not in sources: no Filbur equivalent found in Filbur catalog.