Darlly 75015 Pool Filter Cartridge
Replaces Unicel C-7457 (now C-7473, 75 sq ft)
- Diameter × length
- 7-1/4" × 19-5/8"
- Filter area
- 50 sq ft
- End caps
- 3-1/16" Open w/ step / 3-1/16" Open w/ step
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 75015 is a 50 sq ft pool filter cartridge, 7-1/4" x 19-5/8". It fits the Waterco Trimline C-50 and the Waterco Trimline C-100 (2 cartridges). It replaces Unicel C-7457 (now C-7473, 75 sq ft) and Waterco 62042.
Specifications
| Darlly part number | 75015 |
|---|---|
| Outside diameter | 7-1/4" |
| Length | 19-5/8" |
| Top end cap | 3-1/16" Open w/ step |
| Bottom end cap | 3-1/16" Open w/ step |
| Filter area | 50 sq ft |
| Type | Pool |
| Darlly description | Waterco |
Cross-reference
| Brand | Part numbers Darlly 75015 replaces |
|---|---|
| Unicel | C-7457 (now C-7473, 75 sq ft) |
| OEM and other numbers | Waterco 62042 |
Older or other numbers that also point to this cartridge (not confirmed by a second source): PWC50 (Pleatco).
Filters it fits
| Filter | Cartridges per filter | OEM cartridge number |
|---|---|---|
| Waterco Trimline C-50 (50 sq ft filter) | 1 | 62042 |
| Waterco Trimline C-100 (100 sq ft filter) | 2 | 62042 |
Unicel replaced C-7457 with C-7473, a 75 sq ft cartridge. Darlly's match for C-7473 is 77511, the same size and end caps as 75015.
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-7457?
- Darlly 75015 replaces Unicel C-7457, which Unicel replaced with C-7473, a 75 sq ft cartridge. Both are 7-1/4" in diameter and about 19-5/8" long.
- How many cartridges does the Waterco Trimline C-100 use?
- It takes 2 cartridges. Order 2 of Darlly 75015 to replace the full set.
- What size is Darlly 75015?
- Darlly 75015 is 7-1/4" 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.