Darlly 50353 Spa Filter Cartridge
Replaces Unicel 5CH-35 · Pleatco PMAX50P4 / ULTRA-S11 · Filbur FC-0300
- Diameter × length
- 5-5/8" × 8"
- Filter area
- 35 sq ft
- End caps
- semi-circular Handle / 1-1/2" male thread/MPT
- 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 50353 is a 35 sq ft spa filter cartridge, 5-5/8" x 8". It fits the Maax Elite Spas. It replaces Unicel 5CH-35, Pleatco PMAX50P4 or ULTRA-S11, Filbur FC-0300 and Maax 104309.
Specifications
| Darlly part number | 50353 |
|---|---|
| Outside diameter | 5-5/8" |
| Length | 8" |
| Top end cap | semi-circular Handle |
| Bottom end cap | 1-1/2" male thread/MPT |
| Filter area | 35 sq ft |
| Type | Spa |
| Blue antimicrobial version | 50353M |
| Darlly description | Elite Spas by Maax |
Cross-reference
| Brand | Part numbers Darlly 50353 replaces |
|---|---|
| Unicel | 5CH-35 |
| Pleatco | PMAX50P4, ULTRA-S11 |
| Filbur | FC-0300 |
| Hurricane (former brand) | HF5H35-01 |
| OEM and other numbers | Maax 104309 |
Filters it fits
| Filter | Cartridges per filter | OEM cartridge number |
|---|---|---|
| Maax Elite Spas | 1 | 104309 |
Questions
- What is the Darlly replacement for Unicel 5CH-35?
- Darlly 50353 replaces Unicel 5CH-35. Both are 5-5/8" in diameter and about 8" long.
- What Darlly cartridge replaces Pleatco PMAX50P4?
- Darlly 50353 replaces Pleatco PMAX50P4.
- What size is Darlly 50353?
- Darlly 50353 is 5-5/8" in outside diameter and 8" long, with 35 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.