PA100N / C-7487 / FC-1270
100 sq ft replacement filter cartridge • 7″ OD × 25.5″ 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 | PA100N | Primary |
| Unicel | C-7487 | Equivalent |
| Filbur | FC-1270 | Equivalent |
| OEM | Hayward CX870-XRE | Original Equipment |
| OEM | Hayward CX870RE | Original Equipment |
Always verify dimensions and end-cap type before purchasing a replacement.
Compatible Pool Filter Systems
| Brand | Model |
|---|---|
| Hayward | Super-Star-Clear C4000 |
| Hayward | Super-Star-Clear C4020 |
Frequently Asked Questions
What are the dimensions of the PA100N?
The PA100N measures 7 inches in outer diameter and 25.5 inches in length, with a open top and open bottom. It provides 100 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 PA100N?
The PA100N is interchangeable with C-7487, FC-1270, and OEM equivalents including Hayward CX870-XRE, Hayward CX870RE. All of these share the same 7" OD × 25.5" 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 PA100N filter cartridge?
At 100 sq ft, the PA100N is a large-format pool filter cartridge. In a residential pool with balanced chemistry and regular backwash cycles, most owners get 18-24 months of service before replacement is needed. Inspect the pleats every 3-4 months - if you notice channeling, torn fabric, or the cartridge won't rinse clean, replace it regardless of age.
How do I clean a PA100N filter cartridge?
The PA100N 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, soak the cartridge in a dedicated pool filter cleaner solution (following the product's dwell time instructions), then rinse completely before reinstalling. Having a spare cartridge on hand lets you swap and soak while the pool stays running.
Which hot tubs and spas use the PA100N filter?
Refer to your spa's owner manual or the label inside the filter compartment to confirm compatibility. The part number is usually printed on the end cap of the existing cartridge.
Dimensions
Specifications
| Outer Diameter | 7″ |
|---|---|
| Length | 25.5″ |
| Top Type | Open (no end cap) |
| Bottom Type | Open (no end cap) |
| Filtration Area | 100 sq ft |
| Primary Brand | Pleatco |
| Part Number | PA100N |