Darlly 81351 Pool Filter Cartridge
Replaces Unicel UHD-SR135 · Pleatco PSR135 · Filbur FC-2560
- Diameter × length
- 8-11/16" × 34-1/2"
- Filter area
- 135 sq ft
- End caps
- 4-3/16" Open / 4-3/16" Open w/ 12 concentric slots
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 81351 is a 135 sq ft pool filter cartridge, 8-11/16" x 34-1/2". It replaces Unicel UHD-SR135, Pleatco PSR135 and Filbur FC-2560.
Specifications
| Darlly part number | 81351 |
|---|---|
| Outside diameter | 8-11/16" |
| Length | 34-1/2" |
| Top end cap | 4-3/16" Open |
| Bottom end cap | 4-3/16" Open w/ 12 concentric slots |
| Filter area | 135 sq ft |
| Type | Pool |
| Darlly description | Sta-Rite T-135TX ( Posi-Flo) |
Cross-reference
| Brand | Part numbers Darlly 81351 replaces |
|---|---|
| Unicel | UHD-SR135 |
| Pleatco | PSR135 |
| Filbur | FC-2560 |
Older or other numbers that also point to this cartridge (not confirmed by a second source): PSR135-4 (Pleatco).
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 UHD-SR135?
- Darlly 81351 replaces Unicel UHD-SR135. Both are 8-11/16" in diameter and about 34-1/2" long.
- What Darlly cartridge replaces Pleatco PSR135?
- Darlly 81351 replaces Pleatco PSR135.
- What size is Darlly 81351?
- Darlly 81351 is 8-11/16" in outside diameter and 34-1/2" long, with 135 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.