Meet the Darlly Spa/Pool Replacement Filter Cartridge FC-0821, compatible with P-8410 and C-8410 configurations and identified by the 81007/FC-0821 part numbers. Built for dependable spa and pool filtration, this cartridge delivers true total filtration solutions, helping your water stay clearer, cleaner, and more inviting.
Key compatibility and specifications
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Models: FC-0821, P-8410, C-8410, 81007
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Function: Replacement filter cartridge for Darlly spa/pool systems
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Diameter: 8-15/16 inches
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Length: 23-5/16 inches
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Top style: Open
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Bottom style: Open
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Bottom dimension: 4 inches square
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Top dimension: 4 inches
What sets this cartridge apart
This Darlly replacement cartridge is designed for straightforward maintenance and reliable filtration performance in spa and pool setups. The open-top and open-bottom design simplifies cleaning and backwashing, helping you flush out trapped debris efficiently. Its size is tailored for compatibility with standard Darlly P-8410/C-8410 assemblies, providing a seamless fit that minimizes downtime and maximizes filtration efficiency.
Ideal use scenarios
- Regular spa and hot tub maintenance where quick cartridge swaps keep water sparkling
- Pools with variable filtration needs that benefit from consistent debris removal
- Renovations or seasonal service where a trustworthy, long-lasting cartridge is essential
Benefits in everyday use
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Consistent water clarity through effective particulate capture from spa and pool surfaces
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Low-maintenance design with easy cleaning and replacement to minimize downtime
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Reliable compatibility with Darlly P-8410 and C-8410 filtration systems, reducing guesswork during replacements
Practical tips for best results
- Check pressure or flow regularly; replace the cartridge when you notice a drop in flow or a rise in pressure for your system’s efficiency
- Rinse the cartridge under gentle running water to remove surface debris between replacements; avoid high-pressure jets that could damage the media
- Store and handle cartridges in a cool, dry place to preserve material integrity until installation
Stock and ordering note
Stock is currently limited with arrival anticipated mid-May. You can place your order now, and we’ll attach it to our PO so it ships as soon as stock arrives. This ensures you’re ready to restore peak filtration as soon as the shipment lands.
| Diameter |
8-15/16" |
| Length |
23-5/16" |
| Bottom Style |
Open |
| Top Style |
Open |
| Bottom Dimension |
4" |
| Square Footage |
100 |
| Top Dimension |
4" |
