PMA10 / C-3310 / FC-1001
9 sq ft replacement filter cartridge • 3.875″ OD × 7″ long
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Use the part-number links below to compare compatible cartridges. Prices and availability vary, so verify dimensions before ordering.
Cross-Reference & Interchangeable Part Numbers
| Brand | Part Number | Type |
|---|---|---|
| Pleatco | PMA10 | Primary |
| Unicel | C-3310 | Equivalent |
| Filbur | FC-1001 | Equivalent |
| OEM | Master Spas X268055 | Original Equipment |
| OEM | Master Spas X268057 | Original Equipment |
Always verify dimensions and end-cap type before purchasing a replacement.
Compatible Hot Tubs & Spas
The following spa models use the PMA10 (or an interchangeable equivalent). Always confirm with your owner's manual.
| Brand | Model |
|---|---|
| Master Spas | Twilight Series |
| Master Spas | Legend |
| Master Spas | Clarity |
Frequently Asked Questions
What are the dimensions of the PMA10?
The PMA10 measures 3.875 inches in outer diameter and 7 inches in length, with a open top and open bottom. It provides 9 square feet of filtration area. Always measure your existing cartridge or check the label inside the filter housing before ordering - outer diameter and length are the two critical dimensions, but end-cap style must also match.
What other part numbers are interchangeable with the PMA10?
The PMA10 is interchangeable with C-3310, FC-1001, and OEM equivalents including Master Spas X268055, Master Spas X268057. All of these share the same 3.875" OD × 7" dimensions and open top / open bottom end caps. When buying a cross-reference, confirm the end-cap style matches - a small difference in cap design can prevent proper seating in your filter housing.
How often should I replace a PMA10 filter cartridge?
The PMA10 is a compact 9 sq ft cartridge used in smaller spas and portable units, where it filters a relatively high volume of water per square foot of media. Expect to replace it every 12-18 months with normal use - or sooner in a heavily used spa. Rinse it monthly and deep-clean it quarterly to get the full service life.
How do I clean a PMA10 filter cartridge?
The PMA10 has open ends on both top and bottom, so water flows through freely. Remove the cartridge from its housing and rinse thoroughly with a garden hose, directing the stream at a 45-degree angle between the pleats - work from top to bottom, rotating around the cartridge. Avoid pressure washers, which collapse the pleats and permanently reduce filtration efficiency. For a deeper clean every 3-4 months, soak overnight in a hot tub filter cleaner solution, then rinse thoroughly. Never reinstall a wet cartridge if you're using a cartridge with a closed end - let it dry to prevent trapping moisture inside.
Which hot tubs and spas use the PMA10 filter?
The PMA10 is compatible with the following models: Master Spas Twilight Series, Master Spas Legend, Master Spas Clarity. Always cross-check your spa's owner manual or the label inside the filter compartment to confirm the correct part number.
Dimensions
Specifications
| Outer Diameter | 3.875″ |
|---|---|
| Length | 7″ |
| Top Type | Open (no end cap) |
| Bottom Type | Open (no end cap) |
| Filtration Area | 9 sq ft |
| Primary Brand | Pleatco |
| Part Number | PMA10 |