Darlly 50452 Spa Filter Cartridge
Replaces Unicel 5CH-45 · Pleatco PFF50P4 · Filbur FC-2401
- Diameter × length
- 5-5/16" × 10"
- Filter area
- 45 sq ft
- End caps
- 2-1/8" Open / 1-1/2" male thread/MPT
- Per filter
- 1 cartridge
Pool and spa businesses in Florida, Georgia, South Carolina, Alabama, Mississippi, Louisiana and Texas order through their Grit Game rep. Everywhere else, contact Darlly Filtration directly.
Darlly 50452 is a 45 sq ft spa filter cartridge, 5-5/16" x 10". It fits the Freeflow Spas Legend. It replaces Unicel 5CH-45, Pleatco PFF50P4 and Filbur FC-2401.
Specifications
| Darlly part number | 50452 |
|---|---|
| Outside diameter | 5-5/16" |
| Length | 10" |
| Top end cap | 2-1/8" Open |
| Bottom end cap | 1-1/2" male thread/MPT |
| Filter area | 45 sq ft |
| Type | Spa |
| Blue antimicrobial version | 50452M |
| Darlly description | Freeflow Spas Legend |
Cross-reference
| Brand | Part numbers Darlly 50452 replaces |
|---|---|
| Unicel | 5CH-45 |
| Pleatco | PFF50P4 |
| Filbur | FC-2401 |
| Hurricane (former brand) | HF5H45-01 |
Older or other numbers that also point to this cartridge (not confirmed by a second source): PFF50P (Pleatco).
Filters it fits
| Filter | Cartridges per filter |
|---|---|
| Freeflow Spas Legend | 1 |
Questions
- What is the Darlly replacement for Unicel 5CH-45?
- Darlly 50452 replaces Unicel 5CH-45. Both are 5-5/16" in diameter and about 10" long.
- What Darlly cartridge replaces Pleatco PFF50P4?
- Darlly 50452 replaces Pleatco PFF50P4.
- What size is Darlly 50452?
- Darlly 50452 is 5-5/16" in outside diameter and 10" long, with 45 sq ft of filter area.
Cross-reference checked October 21, 2026 against Unicel's 2026 Replacement Guide, Pleatco's catalog (updated September 2025), filbur.com and darllyfilter.com. A competitor number is listed only when that brand's own data pairs it with the same cartridge size. Always compare the size and end caps of your old cartridge before ordering.
Brand names and part numbers are trademarks of their respective owners and are shown only to identify compatible replacements. Darlly Filtration is not affiliated with or endorsed by them. Cross-reference by The Grit Game, Darlly's sales agency.