PMA45-2004-R / C-8341 / FC-1007
40 sq ft replacement filter cartridge • 8″ OD × 7.375″ 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 | PMA45-2004-R | Primary |
| Unicel | C-8341 | Equivalent |
| Filbur | FC-1007 | Equivalent |
| OEM | Master Spas X268330 | Original Equipment |
| OEM | Master Spas X268552 | Original Equipment |
| OEM | Down East 80402 | Original Equipment |
Always verify dimensions and end-cap type before purchasing a replacement.
Compatible Hot Tubs & Spas
The following spa models use the PMA45-2004-R (or an interchangeable equivalent). Always confirm with your owner's manual.
| Brand | Model |
|---|---|
| Master Spas | Twilight TS 7.2 |
| Master Spas | Twilight TS 8.2 |
| Master Spas | Legend |
| Master Spas | H2X Swim Spa |
Frequently Asked Questions
What are the dimensions of the PMA45-2004-R?
The PMA45-2004-R measures 8 inches in outer diameter and 7.375 inches in length, with a open top and open bottom. It provides 40 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 PMA45-2004-R?
The PMA45-2004-R is interchangeable with C-8341, FC-1007, and OEM equivalents including Master Spas X268330, Master Spas X268552, Down East 80402. All of these share the same 8" OD × 7.375" 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 PMA45-2004-R filter cartridge?
The PMA45-2004-R (40 sq ft) is a mid-size spa filter. Plan on 12-24 months between replacements depending on how heavily the spa is used. Spas used daily or by multiple people will wear out filters faster than a spa used once or twice a week. A good rule of thumb: inspect it at every water change (every 3-4 months) and replace it when the pleats show tearing, channeling, or persistent discoloration.
How do I clean a PMA45-2004-R filter cartridge?
The PMA45-2004-R 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 PMA45-2004-R filter?
The PMA45-2004-R is compatible with the following models: Master Spas Twilight TS 7.2, Master Spas Twilight TS 8.2, Master Spas Legend, Master Spas H2X Swim Spa. 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 | 8″ |
|---|---|
| Length | 7.375″ |
| Top Type | Open (no end cap) |
| Bottom Type | Open (no end cap) |
| Filtration Area | 40 sq ft |
| Primary Brand | Pleatco |
| Part Number | PMA45-2004-R |