Coleman Spas OEM 100533 spa filter (C-4950)

Coleman Spas

Replacement numbers

Unicel C-4950, Pleatco PRB50-IN

Fits Coleman Spas OEM 100533, 3301-2145.

Diameter 4-15/16" (125 mm)Length 13-5/16" (338 mm)50 sq ft

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UnicelC-4950
PleatcoPRB50-IN (Spec table PDF p.32: PRB50-IN lists OEM 100533, 5" x 13-5/16", open 2-1/8", 50 sq ft.)
FilburFC-2390
Top2-1/8" (54 mm) / open
Bottom2-1/8" (54 mm) / open
Ø 4-15/16" (125 mm)13-5/16" (338 mm)Side view · end views belowTopBottom
Top: 2-1/8" (54 mm) / open
Bottom: 2-1/8" (54 mm) / open
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. 50 sq ft media.

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Coleman Spas is the group name on the Coleman Spas row C-4950 cartridge (OEM 100533). Match these numbers: OEM 100533, 3301-2145; Unicel C-4950; Pleatco PRB50-IN; Filbur FC-2390. 4-15/16" across, 13-5/16" long, top 2-1/8" / open, bottom 2-1/8" / open, 50 sq ft.

Catalog note for 100533: Coleman's 50 sq ft open cartridge, the same length as the 25 sq ft OEM 100586. Unicel prints OEM 100533 and 3301-2145. The same 100533 is on the Maax Spas of AZ list with no model name. Filbur prints FC-2390 and cell PRB50-IN. Pleatco prints the outside diameter as 5".

C-4950 (OEM 100533), Pleatco side: Spec table PDF p.32: PRB50-IN lists OEM 100533, 5" x 13-5/16", open 2-1/8", 50 sq ft..

100533, Filbur note: Coleman section PDF p.16: FC-2390, OEM 100533, PRB50-IN, C-4950, 50 sq ft..

Hold C-4950 next to C-4326 differs by Unicel C-4326, Pleatco PRB25-IN, Filbur FC-2375, 25 sq ft, OEM 100586, note says Coleman's 25 sq ft open cartridge. Unicel prints OEM 100586 and 3301-2242 at 4-15/16" x 13-5/16". Filbur's Coleman section prints FC-2375, OEM 100586, PRB25-IN, C-4326, 25 sq ft. Pleatco's PRB25-IN spec lists OEM 100586 among other brands and prints the outside diameter as 5". There is no Coleman model name. This is not the 50 sq ft C-4950, which is the same length.; C-4339 differs by Unicel C-4339, no Pleatco number, Filbur FC-2915, 11-1/4" long, 40 sq ft, OEM 100585, note says Coleman's 40 sq ft open cartridge, shorter than the 13-5/16" pair. Unicel prints OEM 100585 and 3301-2241. The spec table gives 4-15/16" x 11-1/4", open 2-1/8", 216 pleats, 3 oz, 40 sq ft, and describes it as Waterway. Filbur's Coleman section repeats OEM 100585, calls the row Waterway 40, and prints Pleatco cell PWW40. Pleatco deactivates PWW40 with replacement N/A..

Left blank on purpose: Outside diameter 4-15/16" (Unicel and Filbur) versus 5" (Pleatco). No model name on the Coleman row or the Maax row..

Where those figures are printed: Unicel 2026 Replacement Guide on C-4950 (Coleman OEM block PDF p.32: 100533 and 3301-2145 = C-4950, 50 sq ft, 4-15/16" x 13-5/16". Maax Spas of AZ, PDF p.44, repeats OEM 100533 with no model name.). Pleatco 2023 Catalog on C-4950 (Spec table PDF p.32: PRB50-IN lists OEM 100533, 5" OD, 50 sq ft). Filbur Catalog & Reference Guide on C-4950 (Coleman Spas section PDF p.16: FC-2390, OEM 100533, PRB50-IN, C-4950, 50 sq ft).

If you know the Coleman Spas model and not the part number, use the Coleman Spas 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. Number formats: how Filbur, Unicel and Pleatco numbers compare.

The same C-4950 number is also on the Caldera, Jacuzzi, Sundance, Beachcomber, Maax Spas pages.

Other Coleman Spas cartridges

All 12 Coleman Spas 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: Outside diameter 4-15/16" (Unicel and Filbur) versus 5" (Pleatco). No model name on the Coleman row or the Maax row..