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Unicel® C-8412 Replacement Filter Cartridge – 120 Sq Ft

Unicel® C-8412 Replacement Filter Cartridge – 120 Sq Ft

Regular price $96.45
Regular price Sale price $96.45
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Fits Hayward Star-Clear Plus C1200/CX1200RE & Waterway Pro Clean 125

No more guessing whether that bargain cartridge will actually seal—this is the OEM-spec Unicel C-8412, built to the exact tolerances your Hayward and Waterway filters demand. With 172 pleats and 120 sq ft of tough, 4-oz spun-bond polyester media, it traps dust, pollen, algae and other fine debris down to about 20 microns—so you swim in clear water, not murky frustration. 


Key Features

  • Generous Media Area: 120 sq ft of high-loft polyester for maximum dirt-holding capacity.

  • 172 Pleats: More surface area means longer run times between cleanings. 

  • Fine Filtration: Blocks particles down to ~20 microns, keeping your water crisp.

  • Durable End Caps: Open top & bottom with 4″ ID molded gaskets for a rock-solid seal.

  • OEM Fit & Finish: Made with Reemay® media and reinforced cores—no leak-prone knock-offs here.


Dimensions & Specs

Specification Detail
Media Area 120 sq ft
Pleat Count 172
Material 4-oz spun-bond polyester
Micron Rating ~20 μm
Diameter (OD) 8 15⁄16″ (8.9375″)
Length (OAL) 23 5⁄16″ (23.3125″)
End Cap Opening 4″ ID molded gasket (top & bottom)

Compatible Filter Housings & Cross-References

This cartridge isn’t one-and-done for Hayward—you’ve got plenty of aftermarket options that all meet the same specs:

  • Hayward Star-Clear Plus C1200 / CX1200RE

  • Waterway Pro Clean 125 & Clearwater II 125 (817-0125N) 

  • Filbur FC-1293 

  • Pleatco PA120-4 (also PWWPC120) 

  • Pure N Clean PC-120 (check dimensions)

  • SD Filtration SD-01073 (verify OAL)

💡 Pro tip: Always match your housing model and overall length, not just the square footage, to avoid pesky leaks or pressure spikes.


Maintenance & Safety Tips

  1. Power Down & Bleed Pressure: Always shut off the pump and relieve system pressure before swapping cartridges.

  2. Watch Your Gauge: Replace when your filter pressure gauge climbs 8 – 10 psi above the clean-start reading.

  3. Seasonal Swap: In most setups, swapping cartridges once per season keeps flow high and energy use low.

  4. Rinse, Don’t Soak: A good garden-hose rinse between seasons extends service life—skip harsh chemicals and acid.

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