Maax Spas OEM 107092 spa filter (C-5374)

Maax Spas of AZ

Replacement numbers

Unicel C-5374, Pleatco PLBS75

Fits Maax Spas OEM 107092.

Diameter 5-5/16" (135 mm)Length 14-13/16" (376 mm)65 sq ft

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UnicelC-5374
PleatcoPLBS75 (Cross-reference PDF p.47: C-5374 = PLBS75. Spec table PDF p.32: PLBS75, 5-5/16" x 14-3/4", 75 sq ft, OEM 817-0015, 303433, R173600.)
FilburFC-2971
Top2-1/8" (54 mm) / open
Bottom2-1/8" (54 mm) / open
Ø 5-5/16" (135 mm)14-13/16" (376 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. 65 sq ft media.

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Maax Spas of AZ is the group name on the Maax Spas row C-5374 cartridge (OEM 107092). Match these numbers: OEM 107092; Unicel C-5374; Pleatco PLBS75; Filbur FC-2971. 5-5/16" across, 14-13/16" long, top 2-1/8" / open, bottom 2-1/8" / open, 65 sq ft.

What the sources add about 107092: Maax of AZ prints OEM 107092 as C-5374, 65 sq ft, 5-5/16" x 14-13/16", with no model name. Unicel's spec table gives 223 pleats, 3 oz, 65 sq ft, open 2-1/8", for Rec Warehouse S2/G2, Rainbow and Waterway. The S2/G2 OEM line in the same guide prints 75 sq ft for C-5374. Pleatco's cross-reference says C-5374 = PLBS75, and the PLBS75 spec is 5-5/16" x 14-3/4", 75 sq ft, with OEM 817-0015, 303433 and R173600, not 107092. Filbur FC-2971 is 5-5/16" x 14-11/16" and 65 sq ft. The size stored here is Unicel's spec table.

C-5374 (OEM 107092), Pleatco side: Cross-reference PDF p.47: C-5374 = PLBS75. Spec table PDF p.32: PLBS75, 5-5/16" x 14-3/4", 75 sq ft, OEM 817-0015, 303433, R173600..

107092, Filbur note: Dimensional listing: FC-2971, 5-5/16" x 14-11/16", open 2-1/8", PLBS75, C-5374, 65 sq ft..

Before ordering C-5374, compare it with C-4950 differs by Unicel C-4950, Pleatco PRB50-IN, Filbur FC-2390, 4-15/16" diameter, 13-5/16" long, 50 sq ft, OEM 100533, note says Maax of AZ prints OEM 100533 on a 50 sq ft, 4-15/16" x 13-5/16" line and names no model. The heading says see also Coleman Spas. Coleman's block pairs 100533 with 3301-2145. This Maax row does not add the 3301 number, because Unicel does not print it under Maax. Pleatco's outside diameter for PRB50-IN is 5".; and 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: Area 65 sq ft (Unicel spec table, the Maax line, and Filbur) versus 75 sq ft (Pleatco's PLBS75 spec, and Unicel's S2/G2 line). Length 14-13/16" (Unicel), 14-3/4" (Pleatco) or 14-11/16" (Filbur). No Maax model name. 107092 is not on the Pleatco spec line..

Where those figures are printed: Unicel 2026 Replacement Guide on C-5374 (Maax Spas of AZ PDF p.44: 107092 = C-5374, 65 sq ft, 5-5/16" x 14-13/16". Spec table PDF p.11: 223 pleats, 65 sq ft. S2/G2 line PDF p.43 (printed p.39): C-5374 at 75 sq ft.). Pleatco 2023 Catalog on C-5374 (PDF p.47: C-5374 = PLBS75. PDF p.32: PLBS75 at 75 sq ft, 5-5/16" x 14-3/4", OEM 817-0015, 303433, R173600.). Filbur Catalog & Reference Guide on C-5374 (FC-2971: 5-5/16" x 14-11/16", 65 sq ft, PLBS75, C-5374).

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-5374 number is also on the Cal Spas page.

Other Maax Spas cartridges

All 6 Maax Spas spa filters

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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: Area 65 sq ft (Unicel spec table, the Maax line, and Filbur) versus 75 sq ft (Pleatco's PLBS75 spec, and Unicel's S2/G2 line). Length 14-13/16" (Unicel), 14-3/4" (Pleatco) or 14-11/16" (Filbur). No Maax model name. 107092 is not on the Pleatco spec line..