Darlly 50402 Spa Filter Cartridge
Replaces Unicel C-5404 · Pleatco PDO40 (discontinued) · Filbur FC-3097
- Diameter × length
- 5-1/2" × 17"
- Filter area
- 40 sq ft
- End caps
- 1-15/16" Open w/ 12 concentric holes / 2-7/8" Open
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 50402 is a 40 sq ft spa filter cartridge, 5-1/2" x 17". It replaces Unicel C-5404, Pleatco PDO40 (discontinued) and Filbur FC-3097.
Specifications
| Darlly part number | 50402 |
|---|---|
| Outside diameter | 5-1/2" |
| Length | 17" |
| Top end cap | 1-15/16" Open w/ 12 concentric holes |
| Bottom end cap | 2-7/8" Open |
| Filter area | 40 sq ft |
| Type | Spa |
| Darlly description | ozone cartridge (Dimension One Spas) |
Cross-reference
| Brand | Part numbers Darlly 50402 replaces |
|---|---|
| Unicel | C-5404 |
| Pleatco | PDO40 (discontinued) |
| Filbur | FC-3097 |
Questions
- What is the Darlly replacement for Unicel C-5404?
- Darlly 50402 replaces Unicel C-5404. Both are 5-1/2" in diameter and about 17" long.
- What Darlly cartridge replaces Pleatco PDO40?
- Darlly 50402 replaces Pleatco PDO40.
- What size is Darlly 50402?
- Darlly 50402 is 5-1/2" in outside diameter and 17" long, with 40 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.