Maax Spas OEM 100593 spa filter (C-8450)

Maax Spas of AZ

Replacement numbers

Unicel C-8450, Pleatco PCS50N

Fits Maax Spas OEM 100593.

Diameter 8" (203 mm)Length 9" (229 mm)50 sq ft

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UnicelC-8450
PleatcoPCS50N (Spec table PDF p.35: PCS50N lists OEM 100593 and 3301-2261, 2-1/8" open, 2" slip, 50 sq ft.)
FilburFC-3310
Top2-1/16" (52 mm) / open
Bottom2" male slip fitting
Ø 8" (203 mm)9" (229 mm)Side view · end views belowTopBottom
Top: 2-1/16" (52 mm) / open
Bottom: 2" male slip fitting
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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For Maax Spas, C-8450 cartridge (OEM 100593) sits in Maax Spas of AZ. The cross-reference prints OEM 100593; Unicel C-8450; Pleatco PCS50N; Filbur FC-3310. 8" across, 9" long, top 2-1/16" / open, bottom 2" male slip fitting, 50 sq ft.

Catalog note for 100593: Maax of AZ lists OEM 100593 as C-8450, 50 sq ft, 8" x 9", 2" male slip, and names no model. It does not print the model-dated-after-1992 sentence. That sentence is under Coleman's copy of the same OEM, which also prints 3301-2261. This row does not copy the date or the 3301 number onto Maax. Pleatco's opening is 2-1/8". Unicel and Filbur print 2-1/16".

C-8450 (OEM 100593), Pleatco side: Spec table PDF p.35: PCS50N lists OEM 100593 and 3301-2261, 2-1/8" open, 2" slip, 50 sq ft..

100593, Filbur note: Coleman section PDF p.16, not a Maax heading: FC-3310, OEM 100593, PCS50N, C-8450, 50 sq ft, with the after-1992 note..

C-8450 is easy to confuse on the Maax Spas table. C-8475 differs by Unicel C-8475, Pleatco PCS75N, Filbur FC-3320, 13" long, 75 sq ft, OEM 100594, note says Maax of AZ lists OEM 100594 as C-8475, 75 sq ft, 8" x 13", 2" male slip, with no model name and without Coleman's after-1992 note or the 3301-2262 twin. The spec table gives a 2-1/16" opening and 197 pleats. Pleatco PCS75N prints 2-1/8". This is the longer slip cartridge, not the 9" OEM 100593.. 5CH-35 differs by Unicel 5CH-35, Pleatco PMAX50P4, Filbur FC-0300, 5-5/8" diameter, 8" long, top semi-circular handle, bottom 1-1/2" male thread/MPT, 35 sq ft, OEM 104309, note says Unicel's Maax of AZ line names Elite Spas on OEM 104309, 5CH-35, 35 sq ft, 5-5/8" x 8", 1-1/2" MPT. The spec table agrees: 203 pleats, 3 oz, 35 sq ft. A separate heading, Elite Spas by Maax, prints 50 sq ft for the same diameter, length, thread and Unicel number, and prints no OEM. Pleatco's cross-reference sends 5CH-35 to PMAX50P4, specified at 5-3/4" x 8", 50 sq ft, for Maax Spas of Canada, with no OEM. Pleatco also prints PAS35P4 for Elite Spas (Coleman) at 5-7/8" x 7-3/4", 35 sq ft, with no OEM. Filbur FC-0300 is 5-5/8" x 8", 35 sq ft, and its Pleatco cell is PAS35P. The square feet stored here are the spec table's 35. PMAX50P4 is not that 35 sq ft cartridge..

Left blank on purpose: No model name. Opening 2-1/16" versus 2-1/8". The after-1992 note and 3301-2261 are on the Coleman row only..

Where those figures are printed: Unicel 2026 Replacement Guide on C-8450 (Maax Spas of AZ PDF p.44: 100593 = C-8450, 50 sq ft, 8" x 9", 2" male slip, no model and no year note. Spec table PDF p.20: 2-1/16" open, 193 pleats.). Pleatco 2023 Catalog on C-8450 (Spec table PDF p.35: PCS50N, OEM 100593 and 3301-2261, 2-1/8" opening). Filbur Catalog & Reference Guide on C-8450 (Coleman Spas section PDF p.16: FC-3310, OEM 100593, after-1992 note).

If you know the Maax Spas model and not the part number, use the Maax 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-8450 number is also on the Coleman Spas page.

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Sources

Not in sources: No model name. Opening 2-1/16" versus 2-1/8". The after-1992 note and 3301-2261 are on the Coleman row only..