Darlly 40131 Spa Filter Cartridge
Replaces Unicel 4CH-19 · Filbur FC-0122
Darlly 40131 is a 13 sq ft spa filter cartridge, 4-5/8" x 4-5/8". It replaces Unicel 4CH-19 and Filbur FC-0122.
Specifications
| Darlly part number | 40131 |
|---|---|
| Outside diameter | 4-5/8" |
| Length | 4-5/8" |
| Top end cap | Handle |
| Bottom end cap | 1-1/2" male thread/MPT |
| Filter area | 13 sq ft |
| Type | Spa |
| Darlly description | top load |
Cross-reference
| Brand | Part numbers Darlly 40131 replaces |
|---|---|
| Unicel | 4CH-19 |
| Filbur | FC-0122 |
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 4CH-19?
- Darlly 40131 replaces Unicel 4CH-19. Both are 4-5/8" in diameter and about 4-5/8" long.
- What size is Darlly 40131?
- Darlly 40131 is 4-5/8" in outside diameter and 4-5/8" long, with 13 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.