Darlly 75017 Spa Filter Cartridge
Replaces Unicel C-7350 · Pleatco PCD50N · Filbur FC-3963
- Diameter × length
- 7" × 10-3/4"
- Filter area
- 50 sq ft
- End caps
- semi-circular Handle / 2-11/16" Open
- 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 75017 is a 50 sq ft spa filter cartridge, 7" x 10-3/4". It fits the Caldera 50 (new style). It replaces Unicel C-7350, Pleatco PCD50N, Filbur FC-3963, Caldera 1019401 and Caldera 73532.
Specifications
| Darlly part number | 75017 |
|---|---|
| Outside diameter | 7" |
| Length | 10-3/4" |
| Top end cap | semi-circular Handle |
| Bottom end cap | 2-11/16" Open |
| Filter area | 50 sq ft |
| Type | Spa |
| Blue antimicrobial version | 75017M |
| Darlly description | Caldera Spas (new style) |
Cross-reference
| Brand | Part numbers Darlly 75017 replaces |
|---|---|
| Unicel | C-7350 |
| Pleatco | PCD50N |
| Filbur | FC-3963 |
| Hurricane (former brand) | HF7350-01 |
| OEM and other numbers | Caldera 1019401, Caldera 73532 |
Filters it fits
| Filter | Cartridges per filter | OEM cartridge number |
|---|---|---|
| Caldera 50 (new style) (50 sq ft filter) | 1 | 1019401, 73532 |
Other Darlly cartridges the same size
Same diameter and length. Check the end caps and area before swapping.
Questions
- What is the Darlly replacement for Unicel C-7350?
- Darlly 75017 replaces Unicel C-7350. Both are 7" in diameter and about 10-3/4" long.
- What Darlly cartridge replaces Pleatco PCD50N?
- Darlly 75017 replaces Pleatco PCD50N.
- What size is Darlly 75017?
- Darlly 75017 is 7" in outside diameter and 10-3/4" long, with 50 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.