What if my filter is not listed?

Search the part number printed on your old cartridge, or measure its outside diameter and length and use the measurement search. Darlly makes over 600 cartridge sizes.

Spa top-load and skimmer cartridges: Darlly Replacements

Darlly replacements for 9 spa top-load and skimmer cartridges. Each row shows the filter, how many cartridges it takes, the OEM cartridge number, the Darlly part, and the Unicel, Pleatco and Filbur equivalents.

Filter	Darlly	Per filter	Size	OEM cartridge	Unicel	Pleatco	Filbur
skim filter	40101	1	4-1/4" x 4"		C-4310	PWW10	FC-3077
Pageant top load; Dream Maker, Vita, Hydro, Maax, Saratoga	40191	1	4-5/8" x 8"	20245-238	4CH-21		FC-0121
top load	40201	1	4-5/8" x 6-3/4"		4CH-20		FC-0125
top load	40260	1	4-5/8" x 9-3/4"		4CH-24	PGS25P4	FC-0131
top load	42524	1	4-5/8" x 7-1/4"		4CH-925	PSANT20P3	FC-0127
top load	50258	1	5-5/8" x 6"		5CH-25
top load	60252	1	6" x 7"		6CH-26	PTL25W-SV-P4 (discontinued)	FC-0310
skim filter	60354	1	6" x 8"		6CH-352
top load-Coleman Spas, Artesian Spas	70321	1	7" x 8"		7CH-322	PAS35-F2M, ULTRA-S19	FC-0420

Other brands

Hayward29 filters Pentair26 filters Jandy10 filters Sta-Rite15 filters Waterway23 filters Rainbow6 filters Intex, Aqua Leisure and Coleco2 filters Sundance Spas6 filters Jacuzzi5 filters Hot Spring (Watkins)6 filters Caldera Spas3 filters Bullfrog Spas4 filters Artesian Spas4 filters Cal Spas3 filters Marquis Spas2 filters Rec Warehouse and Leisure Bay3 filters Freeflow Spas2 filters D.E. filter grids5 filters PureStream prefilters4 filters

Questions

What if my filter is not listed?: Search the part number printed on your old cartridge, or measure its outside diameter and length and use the measurement search. Darlly makes over 600 cartridge sizes.

Where to buy Darlly cartridges

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.

Find your Grit Game rep Contact Darlly

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.