Darlly 91751 Pool Filter Cartridge
Replaces Unicel C-9417 · Pleatco ULTRA-C5
- Diameter × length
- 10-1/16" × 31-1/8"
- Filter area
- 175 sq ft
- End caps
- 6" Open / 6" 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 91751 is a 175 sq ft pool filter cartridge, 10-1/16" x 31-1/8". It fits the Pentair Clean & Clear 175 (CC175) and Predator 175. It replaces Unicel C-9417, Pleatco ULTRA-C5 and Pentair 173201.
Specifications
| Darlly part number | 91751 |
|---|---|
| Outside diameter | 10-1/16" |
| Length | 31-1/8" |
| Top end cap | 6" Open |
| Bottom end cap | 6" Open |
| Filter area | 175 sq ft |
| Type | Pool |
| Darlly description | Predator, Clean and Clear |
Cross-reference
| Brand | Part numbers Darlly 91751 replaces |
|---|---|
| Unicel | C-9417 |
| Pleatco | ULTRA-C5 |
| OEM and other numbers | Pentair 173201 |
Filters it fits
| Filter | Cartridges per filter | OEM cartridge number |
|---|---|---|
| Pentair Clean & Clear 175 (CC175); Predator 175 (175 sq ft filter) | 1 | 173201 |
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-9417?
- Darlly 91751 replaces Unicel C-9417. Both are 10-1/16" in diameter and about 31-1/8" long.
- What Darlly cartridge replaces Pleatco ULTRA-C5?
- Darlly 91751 replaces Pleatco ULTRA-C5.
- What size is Darlly 91751?
- Darlly 91751 is 10-1/16" in outside diameter and 31-1/8" long, with 175 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.