Darlly 70508 Pool Filter Cartridge
Replaces Unicel C-7656 · Pleatco PA50 (now ULTRA-A11) · Filbur FC-1240
- Diameter × length
- 7" × 19-5/8"
- Filter area
- 50 sq ft
- End caps
- 3" Open w/ molded gasket / 3" Open w/ molded gasket
- 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 70508 is a 50 sq ft pool filter cartridge, 7" x 19-5/8". It fits the Hayward Star-Clear C500 and Easy-Clear C550. It replaces Unicel C-7656, Pleatco PA50 (now ULTRA-A11), Filbur FC-1240, Hayward CX500RE and Hayward CX550RE.
Specifications
| Darlly part number | 70508 |
|---|---|
| Outside diameter | 7" |
| Length | 19-5/8" |
| Top end cap | 3" Open w/ molded gasket |
| Bottom end cap | 3" Open w/ molded gasket |
| Filter area | 50 sq ft |
| Type | Pool |
| Darlly description | Hayward CX500RE |
Cross-reference
| Brand | Part numbers Darlly 70508 replaces |
|---|---|
| Unicel | C-7656 |
| Pleatco | PA50 (now ULTRA-A11), ULTRA-A11 |
| Filbur | FC-1240 |
| Hurricane (former brand) | HF7656-01 |
| OEM and other numbers | Hayward CX500RE, Hayward CX550RE |
Filters it fits
| Filter | Cartridges per filter | OEM cartridge number |
|---|---|---|
| Hayward Star-Clear C500; Easy-Clear C550 (50 sq ft filter) | 1 | CX500RE, CX550RE |
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-7656?
- Darlly 70508 replaces Unicel C-7656. Both are 7" in diameter and about 19-5/8" long.
- What Darlly cartridge replaces Pleatco PA50?
- Darlly 70508 replaces Pleatco PA50, which Pleatco now sells as ULTRA-A11.
- What size is Darlly 70508?
- Darlly 70508 is 7" in outside diameter and 19-5/8" long, with 50 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.