Coleman/Maax 3301-2261 Filter Cartridge
Coleman/Maax OEM number • 50 sq ft • 8.09375″ OD × 8.875″ long
3301-2261 is Coleman/Maax's number for this cartridge, not a part you have to buy from Coleman/Maax. The filter itself is a 50 square foot cartridge measuring 8.09375 inches across and 8.875 inches long, and Pleatco, Unicel, and Filbur all build it. If you read 3301-2261 off an old cartridge or found it in your manual, any of the numbers below drops into the same housing.
Coleman/Maax also lists 100593 against this cartridge. Different numbers on paper, same filter in the box.
Fitment notes
A 2-1/8 inch open top over a 2 inch male slip fitting, not a threaded bottom. Confirmed through Coleman OEM 100593, which Unicel resolves to the same C-8450 at 8 by 9 inches and 50 sq ft with the same slip fitting. This is the smaller sibling of the PCS75N, which shares the design in a 13 inch body at 75 sq ft. The slip fitting is what separates this generation from the older PCS50, which threads in.
What to buy instead
Replacements for the Coleman/Maax 3301-2261
Each button searches Amazon for one of the numbers this cartridge is sold under. The OEM version is usually the most expensive of the set and the aftermarket versions are the same physical filter, so it is worth checking all of them before you order.
Every number for this filter
| Brand | Part Number | Type |
|---|---|---|
| Coleman/Maax | 3301-2261 | The number you searched |
| Pleatco | PCS50N | Aftermarket equivalent |
| Unicel | C-8450 | Aftermarket equivalent |
| Filbur | FC-3310 | Aftermarket equivalent |
| Coleman/Maax | 100593 | Other OEM number |
Full specs, the cartridge diagram, and the complete compatibility list live on the PCS50N cartridge page. You can also see every 8.09375″ × 8.875″ cartridge if you are checking a measurement rather than a part number.
Frequently Asked Questions
What filter replaces the Coleman/Maax 3301-2261?
The PCS50N replaces it directly, and so does every cross-reference for it: C-8450, FC-3310. All of them are the same 50 sq ft cartridge at 8.09375" outer diameter and 8.875" long. Buy whichever is cheapest at the time with solid recent reviews. The same cartridge also shows up as Coleman/Maax 100593, so those are not different filters either.
Is the Coleman/Maax 3301-2261 the same as the PCS50N?
Yes, physically the same filter. Coleman/Maax 3301-2261 is an OEM number, meaning it is the code Coleman/Maax put on the cartridge that shipped with the equipment. Coleman/Maax does not manufacture cartridges. Pleatco, Unicel, and Filbur do, and they sell the identical part under their own numbers at a lower price. Match the dimensions against your old cartridge before ordering and you are covered.
Do I have to buy the Coleman/Maax version?
No. Nothing about the housing requires an OEM-branded cartridge, and the warranty on your equipment is not voided by using an aftermarket filter that meets the same spec. The reason to buy OEM is convenience, not performance. The reason not to is price, which is often a meaningful gap for an identical part. What matters is that outer diameter, length, and end-cap style all match.
What size is the Coleman/Maax 3301-2261?
8.09375 inches in outer diameter, 8.875 inches long, with 50 square feet of filter media. Both measurements need to land within about an eighth of an inch, and the end caps have to match so the cartridge seats correctly when you close the lid. Measure your old one rather than trusting a number that has worn off the label.
Last verified September 2026