Darlly 60453 Spa Filter Cartridge
Replaces Unicel C-6600 · Pleatco PWK40 (discontinued) · Filbur FC-3930
Darlly 60453 is a 45 sq ft spa filter cartridge, 6-3/8" x 11-7/8". It replaces Unicel C-6600, Pleatco PWK40 (discontinued) and Filbur FC-3930.
Specifications
| Darlly part number | 60453 |
|---|---|
| Outside diameter | 6-3/8" |
| Length | 11-7/8" |
| Top end cap | 3" Open |
| Bottom end cap | 3" Open |
| Filter area | 45 sq ft |
| Type | Spa |
| Darlly description | Hot Springs Spas/ Watkins Mfg. |
Cross-reference
| Brand | Part numbers Darlly 60453 replaces |
|---|---|
| Unicel | C-6600 |
| Pleatco | PWK40 (discontinued) |
| Filbur | FC-3930 |
Older or other numbers that also point to this cartridge (not confirmed by a second source): PWK25 (Pleatco).
Questions
- What is the Darlly replacement for Unicel C-6600?
- Darlly 60453 replaces Unicel C-6600. Both are 6-3/8" in diameter and about 11-7/8" long.
- What Darlly cartridge replaces Pleatco PWK40?
- Darlly 60453 replaces Pleatco PWK40.
- What size is Darlly 60453?
- Darlly 60453 is 6-3/8" in outside diameter and 11-7/8" long, with 45 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.