Unicel Replacement Filter Cartridge 25 sq. ft. Each, 2-Pack (50 sq. ft. System) | C-4405
- In stock, ready to ship
- SKU:
- C-4405
-
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About This Item
The Unicel C-4405 is a 4000 Series 2-cartridge replacement set engineered for the Rainbow DSF-50 and Pentair Dynamic Series IV spa and pool skim filters. Each cartridge delivers 25 sq. ft. of filtration area — 50 sq. ft. combined when both are installed as a matched set. With 158 pleats of 4 oz. Reemay 2040 polyester media, these cartridges provide outstanding dirt-holding capacity and lasting performance between cleanings.
📦 Complete Service Set — 2 Cartridges Included
This listing includes 2 cartridges — the full quantity needed for one complete filter service. The Pentair Dynamic Series IV (DFML-25C and Model DSF) uses one cartridge per housing in a dual-canister system; this 2-pack covers both housings in a single purchase. Some compatible spa models use only a single cartridge — if your system has one housing, one cartridge from this set is sufficient.
Specifications
| Filter Area | 25 sq. ft. each (50 sq. ft. per 2-pack set) |
| Length | 6 5/8" |
| Outer Diameter | 4 15/16" |
| Top Inner Diameter | 2 1/8" |
| Bottom Inner Diameter | 2 1/8" |
| Material | 4 oz. Reemay 2040 |
| Pleat Count | 158 |
|
Top Cap: open
|
Bottom Cap: open
|
Note from Unicel: 2 cartridges per set with stick handle.
Fits Into:
| OEM Brand | Product Name | Part Number | Notes |
| Pentair | Dynamic Series IV – DFML-25C | R173433 | One cartridge per housing; 2-pack covers both housings. |
| Pentair | Dynamic Series IV – Model DSF | R173433 | One cartridge per housing; 2-pack covers both housings. |
| Pentair – Rainbow Plastics | Dynamic Series IV – DFML-25C | 17-2464 | One cartridge per housing; 2-pack covers both housings. |
| Pentair – Rainbow Plastics | Dynamic Series IV – Model DSF | 17-2464 | One cartridge per housing; 2-pack covers both housings. |
| Waterway Plastics | Skim Filter | 817-5010 | |
| Beachcomber | — | 3005825 | |
| Marquis Spas | — | — | System utilizes a single cartridge. |
| Freedom Spas | — | — | Models dated after 1993. |
| Also compatible with select models from: Catalina Spas, Clearwater Spas, Discovery Spas, Legend Spas, Lifestyle Spas (Canada), Moose Mountain Spas (Canada), Signature Spas, Sunrise Spas, Thermo Spas of Connecticut, US Tooling & Spa, Diamond Back Spas, Canspa Mfg. (Canada) | |||
(This is not an exhaustive list.)
Also known as: C4405
