4-15/16" × 13-5/16"
Beachcomber spa filters
Beachcomber sells two current microfilters of the same outside size for hot tubs built from 1995 on: SKU 3005845 at 25 sq ft (107 pleats) and SKU 3005815 at 50 sq ft (212 pleats), both 4-15/16" × 13-5/16" with a 2-1/8" open core. Unicel lists those stock numbers as C-4326 and C-4950. Beachcomber does not say which model takes which.
Tubs from before 1995 take a two-piece set, SKU 3005820 (35 sq ft) or 3005825 (50 sq ft). Beachcomber prints no length for them; Unicel and Filbur size the cartridges at 4-5/8" and 6-5/8". Pleatco prints a 5" outside diameter for the same Unicel numbers. The year split, the pleat-count difference and the care interval from Beachcomber’s 2025 owner’s guide are on the Beachcomber filter-by-year page.
This page lists 4 Beachcomber replacement cartridges from the Unicel 2026 Replacement Guide, the Pleatco 2023 catalog, the Filbur catalog and manufacturer and retailer pages, plus model and model-year fitment for 4 of them (2 hot tub models in total). 4 have a Filbur number. Find your spa filter by the OEM part number on the end cap, or measure it and compare sizes below.
Clean and replace intervals for one cartridge on this list, plus the cross-reference numbers and a buy link: filter replacement schedule and reorder.
- 3005845C-4326, 4-15/16" (125 mm) × 13-5/16" (338 mm)See replacement
- 3005815C-4950, 4-15/16" (125 mm) × 13-5/16" (338 mm)See replacement
- 3005820C-4401, 4-15/16" (125 mm) × 4-5/8" (117 mm)See replacement
- 3005825C-4405, 4-15/16" (125 mm) × 6-5/8" (168 mm)See replacement
| Cartridge | Unicel | Pleatco | Filbur | Size | Fits | Status |
|---|---|---|---|---|---|---|
| 3005845 | C-4326 | PRB25-IN | FC-2375 | 4-15/16" (125 mm) × 13-5/16" (338 mm), 25 sq ft | 1 model | verified |
| 3005815 | C-4950 | PRB50-IN | FC-2390 | 4-15/16" (125 mm) × 13-5/16" (338 mm), 50 sq ft | 1 model | verified |
| 3005820 | C-4401 | PRB17.5SF-PAIR | FC-2386 | 4-15/16" (125 mm) × 4-5/8" (117 mm), 35 sq ft | 1 model | verified |
| 3005825 | C-4405 | PRB25SF-PAIR | FC-2387 | 4-15/16" (125 mm) × 6-5/8" (168 mm), 50 sq ft | 1 model | verified |
Know your model but not the part number? See Beachcomber filter by model and year.
Brands that share cartridges with Beachcomber
- Freedom Spas, same part numbers C-4950, C-4401, C-4405
- Coleman Spas, same part numbers C-4326, C-4950
- Jacuzzi, same part numbers C-4326, C-4950
- PDC Spas, same part numbers C-4326, C-4405
- Waterway Plastics, same part numbers C-4326, C-4950
Guides that apply to Beachcomber
- Why the same size can be 25 or 50 sq ft
- Open-end vs threaded hot tub filters
- How Filbur, Unicel and Pleatco numbers compare
- How to find your spa filter size
- How to install a cartridge
- All guides
Search Beachcomber part numbers on Amazon
Each button opens an Amazon search for that part number. The cartridge page is where the cited size and fittings are. Match those before you buy.
Part numbers from this table
-
C-4326 cartridge (SKU 3005845) -
C-4950 cartridge (SKU 3005815) 4-15/16" × 13-5/16"
-
C-4401 cartridge (SKU 3005820) 4-15/16" × 4-5/8"
-
C-4405 cartridge (SKU 3005825) 4-15/16" × 6-5/8"
Disclosure: we may earn a commission from qualifying purchases made through retailer links on this site, at no extra cost to you. As an Amazon Associate I earn from qualifying purchases. Amazon links on this page go to Amazon.com and are affiliate links; they never change what we write, and the list is not ranked by commission. Each “Search on Amazon” button opens an Amazon search for the part or product name shown, not a single listing we pre-checked. Check size, quantity and your spa maker’s guidance before you buy. See our affiliate disclosure.
Model-year fitment comes only from the sources named on each cartridge page. Where no source lists models or years, the page says so.