Darlly 40101 Spa Filter Cartridge
Replaces Unicel C-4310 · Pleatco PWW10 · Filbur FC-3077
- Diameter × length
- 4-1/4" × 4"
- Filter area
- 10 sq ft
- End caps
- 2-1/16" Open / 2-1/16" 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 40101 is a 10 sq ft spa skim filter cartridge, 4-1/4" x 4". It replaces Unicel C-4310, Pleatco PWW10 and Filbur FC-3077.
Specifications
| Darlly part number | 40101 |
|---|---|
| Outside diameter | 4-1/4" |
| Length | 4" |
| Top end cap | 2-1/16" Open |
| Bottom end cap | 2-1/16" Open |
| Filter area | 10 sq ft |
| Type | Spa |
| Blue antimicrobial version | 40101M |
| Darlly description | skim filter |
Cross-reference
| Brand | Part numbers Darlly 40101 replaces |
|---|---|
| Unicel | C-4310 |
| Pleatco | PWW10 |
| Filbur | FC-3077 |
| Hurricane (former brand) | HF4310-02 |
Filters it fits
| Filter | Cartridges per filter |
|---|---|
| skim filter | 1 |
Questions
- What is the Darlly replacement for Unicel C-4310?
- Darlly 40101 replaces Unicel C-4310. Both are 4-1/4" in diameter and about 4" long.
- What Darlly cartridge replaces Pleatco PWW10?
- Darlly 40101 replaces Pleatco PWW10.
- What size is Darlly 40101?
- Darlly 40101 is 4-1/4" in outside diameter and 4" long, with 10 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.