Darlly 40206 Spa Filter Cartridge
- Diameter × length
- 4-5/8" × 8"
- Filter area
- 20 sq ft
- End caps
- semi-circular handle / 1-1/2" SAE
- 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 40206 is a 20 sq ft spa filter cartridge, 4-5/8" x 8". It fits some Strong Industries spa filters. Check that your old cartridge is the same size, with the same end caps, before ordering.
Specifications
| Darlly part number | 40206 |
|---|---|
| Outside diameter | 4-5/8" |
| Length | 8" |
| Top end cap | semi-circular handle |
| Bottom end cap | 1-1/2" SAE |
| Filter area | 20 sq ft |
| Type | Spa |
| Blue antimicrobial version | 40206M |
| Darlly description | STRONG INDUSTRIES |
Filters it fits
| Filter | Cartridges per filter |
|---|---|
| Strong Industries | 1 |
Other Darlly cartridges the same size
Same diameter and length. Check the end caps and area before swapping.
Questions
- What size is Darlly 40206?
- Darlly 40206 is 4-5/8" in outside diameter and 8" long, with 20 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.