Darlly 50209 Spa Filter Cartridge
Replaces Unicel 5CH-203 · Pleatco PLAS20
- Diameter × length
- 5-3/8" × 7"
- Filter area
- 20 sq ft
- End caps
- Closed / 3" male thread/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 50209 is a 20 sq ft spa filter cartridge, 5-3/8" x 7". It replaces Unicel 5CH-203 and Pleatco PLAS20.
Specifications
| Darlly part number | 50209 |
|---|---|
| Outside diameter | 5-3/8" |
| Length | 7" |
| Top end cap | Closed |
| Bottom end cap | 3" male thread/MPT |
| Filter area | 20 sq ft |
| Type | Spa |
| Darlly description | LA Spas sock filter substitute |
Cross-reference
| Brand | Part numbers Darlly 50209 replaces |
|---|---|
| Unicel | 5CH-203 |
| Pleatco | PLAS20 |
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 5CH-203?
- Darlly 50209 replaces Unicel 5CH-203. Both are 5-3/8" in diameter and about 7" long.
- What Darlly cartridge replaces Pleatco PLAS20?
- Darlly 50209 replaces Pleatco PLAS20.
- What size is Darlly 50209?
- Darlly 50209 is 5-3/8" in outside diameter and 7" long, with 20 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.