Coleman/Maax 3301-2111 Filter Cartridge
Coleman/Maax OEM number • 50 sq ft • 7.0625″ OD × 14.8125″ long
3301-2111 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 7.0625 inches across and 14.8125 inches long, and Pleatco, Unicel, and Filbur all build it. If you read 3301-2111 off an old cartridge or found it in your manual, any of the numbers below drops into the same housing.
Coleman/Maax also lists 100522 against this cartridge. Different numbers on paper, same filter in the box.
Fitment notes
Semi-circular handle top with a 2 inch male NPT adapter on the bottom (Pleatco's F2M fitting). Confirmed through Coleman OEM 100522, which Unicel resolves to the same 7CH-502 at 7 by 14-3/4 inches and 50 sq ft. Same body as the PCS50, which takes a 1-1/2 inch thread instead. Unicel notes that the 7CH-502 also replaces its discontinued C-7400, the Goldkey cartridge with one blue and one orange end cap, once the threaded PAD adapter is removed from the skim well.
What to buy instead
Replacements for the Coleman/Maax 3301-2111
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 | 3301-2111 | The number you searched |
| Pleatco | PCS50-F2M | Aftermarket equivalent |
| Unicel | 7CH-502 | Aftermarket equivalent |
| Filbur | FC-0460 | Aftermarket equivalent |
| Coleman/Maax | 100522 | Other OEM number |
Full specs, the cartridge diagram, and the complete compatibility list live on the PCS50-F2M cartridge page. You can also see every 7.0625″ × 14.8125″ cartridge if you are checking a measurement rather than a part number.
Frequently Asked Questions
What filter replaces the Coleman/Maax 3301-2111?
The PCS50-F2M replaces it directly, and so does every cross-reference for it: 7CH-502, FC-0460. All of them are the same 50 sq ft cartridge at 7.0625" outer diameter and 14.8125" long. Buy whichever is cheapest at the time with solid recent reviews. The same cartridge also shows up as Coleman/Maax 100522, so those are not different filters either.
Is the Coleman/Maax 3301-2111 the same as the PCS50-F2M?
Yes, physically the same filter. Coleman/Maax 3301-2111 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 3301-2111?
7.0625 inches in outer diameter, 14.8125 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