Darlly 40122 Pool Filter Cartridge
Replaces Unicel C-4312 (now C-4325, 25 sq ft) · Pleatco PA12 (now ULTRA-D7) · Filbur FC-1210
- Diameter × length
- 4-5/8" × 11-7/8"
- Filter area
- 12 sq ft
- End caps
- 2-1/16" Open / 2-1/16" 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 40122 is a 12 sq ft pool filter cartridge, 4-5/8" x 11-7/8". It replaces Unicel C-4312 (now C-4325, 25 sq ft), Pleatco PA12 (now ULTRA-D7) and Filbur FC-1210.
Specifications
| Darlly part number | 40122 |
|---|---|
| Outside diameter | 4-5/8" |
| Length | 11-7/8" |
| Top end cap | 2-1/16" Open |
| Bottom end cap | 2-1/16" Open |
| Filter area | 12 sq ft |
| Type | Pool |
| Darlly description | Hayward C120RE |
Cross-reference
| Brand | Part numbers Darlly 40122 replaces |
|---|---|
| Unicel | C-4312 (now C-4325, 25 sq ft) |
| Pleatco | PA12 (now ULTRA-D7), ULTRA-D7 |
| Filbur | FC-1210 |
Unicel replaced C-4312 with C-4325, a 25 sq ft cartridge. Darlly's match for C-4325 is 40254, the same size and end caps as 40122.
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-4312?
- Darlly 40122 replaces Unicel C-4312, which Unicel replaced with C-4325, a 25 sq ft cartridge. Both are 4-5/8" in diameter and about 11-7/8" long.
- What Darlly cartridge replaces Pleatco PA12?
- Darlly 40122 replaces Pleatco PA12, which Pleatco now sells as ULTRA-D7.
- What size is Darlly 40122?
- Darlly 40122 is 4-5/8" in outside diameter and 11-7/8" long, with 12 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.