Darlly 50801 Spa Filter Cartridge
Replaces Unicel C-5397 · Pleatco PLBS100 · Filbur FC-2972
- Diameter × length
- 5-5/16" × 17-13/16"
- Filter area
- 80 sq ft
- End caps
- 2-1/8" Open / 2-1/8" Open
- 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 50801 is an 80 sq ft spa filter cartridge, 5-5/16" x 17-13/16". It fits the Rec Warehouse / Leisure Bay S2/G2 Spa 100, Rainbow and Waterway. It replaces Unicel C-5397, Pleatco PLBS100, Filbur FC-2972, Waterway 817-0016 and Rec Warehouse / Leisure Bay 173601.
Specifications
| Darlly part number | 50801 |
|---|---|
| Outside diameter | 5-5/16" |
| Length | 17-13/16" |
| Top end cap | 2-1/8" Open |
| Bottom end cap | 2-1/8" Open |
| Filter area | 80 sq ft |
| Type | Spa |
| Blue antimicrobial version | 50801M |
| Darlly description | Rec Warehouse S2/G2 Spa, Rainbow, Waterway |
Cross-reference
| Brand | Part numbers Darlly 50801 replaces |
|---|---|
| Unicel | C-5397 |
| Pleatco | PLBS100 |
| Filbur | FC-2972 |
| Hurricane (former brand) | HF5397-01 |
| OEM and other numbers | Waterway 817-0016, Rec Warehouse / Leisure Bay 173601 |
Filters it fits
| Filter | Cartridges per filter | OEM cartridge number |
|---|---|---|
| Rec Warehouse / Leisure Bay S2/G2 Spa 100; Rainbow; Waterway (80 sq ft filter) | 1 | 817-0016, 173601 |
Questions
- What is the Darlly replacement for Unicel C-5397?
- Darlly 50801 replaces Unicel C-5397. Both are 5-5/16" in diameter and about 17-13/16" long.
- What Darlly cartridge replaces Pleatco PLBS100?
- Darlly 50801 replaces Pleatco PLBS100.
- What size is Darlly 50801?
- Darlly 50801 is 5-5/16" in outside diameter and 17-13/16" long, with 80 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.