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.
Beachcomber OEM 3005845 spa filter (C-4326)
Beachcomber microfilter, 1995 to present
Replacement numbers
Unicel C-4326, Pleatco PRB25-IN
Fits Beachcomber OEM 3005845.
Diameter 4-15/16" (125 mm)Length 13-5/16" (338 mm)25 sq ft1 model listedUnicel C-4326
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| Unicel | C-4326 |
|---|---|
| Pleatco | PRB25-IN (Unicel-to-Pleatco cross reference, PDF p.47: C-4326 = PRB25-IN. Spec table PDF p.32 prints PRB25-IN at 5" x 13-5/16", 2-1/8" open ends, 3 oz, 25 sq ft, for Rainbow / Waterway / CMP, with no Beachcomber stock number.) |
| Filbur | FC-2375 |
| Top | 2-1/8" (54 mm) / open |
| Bottom | 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. 25 sq ft media.
For Beachcomber, C-4326 cartridge (SKU 3005845) sits in Beachcomber microfilter, 1995 to present. The cross-reference prints OEM 3005845; Unicel C-4326; Pleatco PRB25-IN; Filbur FC-2375. 4-15/16" across, 13-5/16" long, top 2-1/8" / open, bottom 2-1/8" / open, 25 sq ft.
Catalog note for 3005845: Beachcomber's 25 sq ft microfilter for hot tubs from 1995 to the present. Beachcomber and Unicel agree on 4-15/16" x 13-5/16", a 2-1/8" open core and 3 oz media. Beachcomber counts 107 pleats; Unicel's spec table counts 106 for C-4326. Unicel calls C-4950 an upgrade of this body. Pleatco prints PRB25-IN at 5" outside diameter and does not name Beachcomber.
C-4326 (OEM 3005845), Pleatco side: Unicel-to-Pleatco cross reference, PDF p.47: C-4326 = PRB25-IN. Spec table PDF p.32 prints PRB25-IN at 5" x 13-5/16", 2-1/8" open ends, 3 oz, 25 sq ft, for Rainbow / Waterway / CMP, with no Beachcomber stock number..
3005845, Filbur note: Beachcomber Spas section, PDF p.15: FC-2375, 4-15/16" x 13-5/16", 2-1/8" open, Rainbow Dynamic 25, 3 oz, PRB25-IN, C-4326, 25 sq ft. Filbur does not print SKU 3005845..
Model list attached to C-4326 cartridge (SKU 3005845): Beachcomber hot tubs, years 1995 to present, listed by Beachcomber Hot Tubs product page (25 sq ft microfilter; Beachcomber does not name a model).
Before ordering C-4326, compare it with C-4950 differs by Unicel C-4950, Pleatco PRB50-IN, Filbur FC-2390, 50 sq ft, OEM 3005815, note says Beachcomber's 50 sq ft microfilter, the same outside size as SKU 3005845, for hot tubs from 1995 to the present. Beachcomber counts 212 pleats of 3 oz fiber and says this cartridge has double the medium of the 25 sq ft model. Unicel's spec table also counts 212 pleats for C-4950 and calls it an upgrade of C-4326. Neither source prints a micron rating. Pleatco prints PRB50-IN at 5" outside diameter.; and C-4405 differs by Unicel C-4405, Pleatco PRB25SF-PAIR, Filbur FC-2387, 6-5/8" long, 50 sq ft, OEM 3005825, note says Beachcomber's two-piece 50 sq ft set for the same generally pre-1995 upfront weir as SKU 3005820. The page says the 50 sq ft medium doubles filtration capacity and prints no length. Unicel and Filbur size it at 4-15/16" x 6-5/8", longer than the 35 sq ft pre-1995 cartridge, so it is not the same body with more pleats. Unicel counts 158 pleats and 4 oz, two per set. Pleatco prints PRB25SF-PAIR at 5" x 6-5/8"..
Left blank on purpose: Pleat count 107 (Beachcomber) vs 106 (Unicel); Pleatco outside diameter 5" vs 4-15/16".
Source locations for this Beachcomber row: Beachcomber Hot Tubs (manufacturer product page) on C-4326 (SKU 3005845: 25 sq ft, 4-15/16" diameter, 2-1/8" core, 13-5/16" height, 107 pleats, 3 oz, 1995 to current). Unicel 2026 Replacement Guide on C-4326 (Beachcomber OEM cross-reference, PDF p.29 (printed p.25): 3005845 = C-4326, 4-15/16" x 13-5/16", 25 sq ft, 3 oz; spec table PDF p.9 (printed p.5): 106 pleats, 2-1/8" open ends). Pleatco 2023 Catalog on C-4326 (Unicel-to-Pleatco cross reference, PDF p.47 (C-4326 = PRB25-IN); spec table PDF p.32 (5" OD)). Filbur Catalog & Reference Guide on C-4326 (Beachcomber Spas, PDF p.15: FC-2375 = C-4326, 4-15/16" x 13-5/16", 25 sq ft).
Hot tubs listed for this cartridge
The rest of the Beachcomber model list is the Beachcomber filter by model and year lookup.
| Model / system | Years | Listed by |
|---|---|---|
| Beachcomber hot tubs (25 sq ft microfilter; Beachcomber does not name a model) | 1995 to present | Beachcomber Hot Tubs product page |
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-4326 number is also on the Hot Spring, Hot Spot, Jacuzzi, PDC Spas, Coleman Spas pages.
Other Beachcomber cartridges
- C-4950 cartridge (SKU 3005815), 4-15/16" (125 mm) × 13-5/16" (338 mm)
- C-4405 cartridge (SKU 3005825), 4-15/16" (125 mm) × 6-5/8" (168 mm)
- C-4401 cartridge (SKU 3005820), 4-15/16" (125 mm) × 4-5/8" (117 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
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Leisure Time O Filter Clean Cartridge Cleaner Listing title: cartridge cleaner, 32 fl oz.
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SpaGuard Filter Cleaner Listing title: filter cleaner for spas and hot tubs, 1 quart.
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AquaChek SPA 6-in-1 Test Strips Listing title: reads total bromine, total chlorine, free chlorine, pH, total alkalinity and total hardness.
Unicel C-4326 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
- Beachcomber Hot Tubs (manufacturer product page): SKU 3005845: 25 sq ft, 4-15/16" diameter, 2-1/8" core, 13-5/16" height, 107 pleats, 3 oz, 1995 to current (web page)
- Unicel 2026 Replacement Guide: Beachcomber OEM cross-reference, PDF p.29 (printed p.25): 3005845 = C-4326, 4-15/16" x 13-5/16", 25 sq ft, 3 oz; spec table PDF p.9 (printed p.5): 106 pleats, 2-1/8" open ends (PDF)
- Pleatco 2023 Catalog: Unicel-to-Pleatco cross reference, PDF p.47 (C-4326 = PRB25-IN); spec table PDF p.32 (5" OD) (PDF)
- Filbur Catalog & Reference Guide: Beachcomber Spas, PDF p.15: FC-2375 = C-4326, 4-15/16" x 13-5/16", 25 sq ft (PDF)
Not in sources: Pleat count 107 (Beachcomber) vs 106 (Unicel); Pleatco outside diameter 5" vs 4-15/16".