Darlly 42518 Spa Filter Cartridge
Replaces Filbur FC-3029
- Diameter × length
- 4-3/8" × 7-3/4"
- Filter area
- 25 sq ft
- End caps
- Closed / 1-1/2" MPT
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 42518 is a 25 sq ft spa filter cartridge, 4-3/8" x 7-3/4". It replaces Filbur FC-3029.
Specifications
| Darlly part number | 42518 |
|---|---|
| Outside diameter | 4-3/8" |
| Length | 7-3/4" |
| Top end cap | Closed |
| Bottom end cap | 1-1/2" MPT |
| Filter area | 25 sq ft |
| Type | Spa |
| Darlly description | Pageant Spa Top Load |
Cross-reference
| Brand | Part numbers Darlly 42518 replaces |
|---|---|
| Filbur | FC-3029 |
Questions
- What size is Darlly 42518?
- Darlly 42518 is 4-3/8" in outside diameter and 7-3/4" long, with 25 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.