Master Spas X268057 Filter Cartridge
Master Spas OEM number • 9 sq ft • 3.875″ OD × 7″ long
X268057 is Master Spas's number for this cartridge, not a part you have to buy from Master Spas. The filter itself is a 9 square foot cartridge measuring 3.875 inches across and 7 inches long, and Pleatco, Unicel, and Filbur all build it. If you read X268057 off an old cartridge or found it in your manual, any of the numbers below drops into the same housing.
Master Spas also lists X268055 against this cartridge. Different numbers on paper, same filter in the box.
Fitment notes
2-1/8 inch open top and bottom. Master Spas EcoPur inner/circulation filter (non-EcoPur pre-2004). Clarity Elite inner filter.
What to buy instead
Replacements for the Master Spas X268057
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 |
|---|---|---|
| Master Spas | X268057 | The number you searched |
| Pleatco | PMA10 | Aftermarket equivalent |
| Unicel | C-3310 | Aftermarket equivalent |
| Filbur | FC-1001 | Aftermarket equivalent |
| Master Spas | X268055 | Other OEM number |
Full specs, the cartridge diagram, and the complete compatibility list live on the PMA10 cartridge page. You can also see every 3.875″ × 7″ cartridge if you are checking a measurement rather than a part number.
Equipment that uses this cartridge
Looking for a different model? Browse every Master Spas model we cover.
Frequently Asked Questions
What filter replaces the Master Spas X268057?
The PMA10 replaces it directly, and so does every cross-reference for it: C-3310, FC-1001. All of them are the same 9 sq ft cartridge at 3.875" outer diameter and 7" long. Buy whichever is cheapest at the time with solid recent reviews. The same cartridge also shows up as Master Spas X268055, so those are not different filters either.
Is the Master Spas X268057 the same as the PMA10?
Yes, physically the same filter. Master Spas X268057 is an OEM number, meaning it is the code Master Spas put on the cartridge that shipped with the equipment. Master Spas 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 Master Spas 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 Master Spas X268057?
3.875 inches in outer diameter, 7 inches long, with 9 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.
Data updated September 2026