Meet the Filbur FC-3930 Spa/Pool Replacement Filter Cartridge—the durable, long-lasting solution built to keep water crystal clear in both salt and traditional chlorine systems. Filbur is the leading OEM filter manufacturer in the USA, and this cartridge embodies our commitment to value, strength, and easy maintenance.
Built to endure and perform
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Extruded PVC center cores deliver the strongest backbone—round holes distribute stress evenly, preventing cracks and collapse even under heavy debris loading.
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Reinforced center cores improve debris loading and pressure differential, helping you go longer between cleanings.
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Premium polyester media offers durability and efficient filtration for longer filter life and clearer water.
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Sharp pleat folds with a unique synthetic fiber construction prevent bridging, letting dirt penetrate deep into the folds for higher flow and easier cleaning.
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Reinforced antimicrobial end caps repel odor-causing bacteria and mold, and resist deterioration from salt pools and high chlorine.
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Wider break-resistant bands keep pleats evenly spaced and prevent flutter due to housing turbulence, preserving filtration efficiency.
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End caps with integrated fittings eliminate the need for pad adapters, simplifying installation and preserving flow.
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Embossed part numbers for easy identification and re-ordering.
Direct replacement for your Filbur FC-3930
This cartridge is designed to slot into standard FC-3930-compatible filter housings, delivering factory-grade filtration performance in a simple swap. It’s built to endure the chemical realities of saltwater pools as well as high-chlorine spa environments, translating to longer service life and fewer cartridge changes.
What makes it worth choosing
- Reliable filtration that supports water clarity and swimmer comfort, even in challenging water chemistry.
- Lower maintenance effort thanks to higher debris loading and easy-to-clean pleats.
- Less downtime and fewer replacements compared to generic cartridges.
Quick setup and care tips
- Power off your pump and relieve pressure before removing the old cartridge.
- Rinse the new FC-3930 cartridge under running water to remove any packaging dust.
- Insert into the housing with the flow direction correctly aligned, then reseal and restart the system.
- Regularly inspect for signs of wear and perform a thorough rinse when flow appears reduced or the pressure gauge rises.
