Description
Meet the Filbur Rectangular DE Grid FC-9820—the durable, OEM-grade replacement grid designed to elevate pool and spa filtration. Sized at 18" x 9-11/16" with a center port, this DE grid is engineered to slot seamlessly into Filbur’s rectangular filter housings, delivering dependable performance season after season.
Why this DE grid stands out
- Reinforced center cores with extruded PVC construction provide even stress distribution and higher debris loading, helping prevent cartridge collapse under heavy filtration duty and extending time between cleanings.
- Antimicrobial end caps—reinforced for strength and treated to repel odor-causing bacteria and mold—paired with end caps that have integrated fittings to simplify installation and maintenance.
- Premium filtration media using durable, high-quality polyester that resists wear, maintains flow, and supports longer service life in both salt pools and high-chlorine environments.
- Sharp pleat folds and unique grid geometry prevent bridging, allowing dirt to penetrate deep into the folds for improved filtration efficiency and easier cleaning.
- Wider break-resistant bands keep pleats evenly spaced, reduce flutter from turbulence in the housing, and sustain optimal flow over time.
- Embossed part numbers simplify identification and re-ordering, ensuring you grab the exact FC-9820 replacement when it’s time for a swap.
- Fittings molded into the end caps eliminate the need for PAD adapters, preserving flow and simplifying replacement in your existing filtration setup.
Designed for real-world use
This rectangular DE grid thrives in demanding pool and spa environments. Its construction is optimized for:
- Saltwater systems, where resin and salt can accelerate wear on lesser designs.
- High-chlorine pools where durability and long-term performance matter for consistent water clarity.
- Applications requiring dependable debris loading without sacrificing flow or ease of cleaning.
With the FC-9820 DE grid, you’ll notice fewer maintenance interruptions and more reliable filtration efficiency. The center port design supports straightforward installation in compatible housings, while the robust core and end-cap construction help minimize downtime caused by component failures.
Ideal for:
- Pool owners upgrading aging filter grids who want OEM-grade performance and longer intervals between cleanings.
- Spa enthusiasts seeking consistent filtration and odor/mold resistance in humid, chemical-heavy environments.
- Service professionals aiming to stock a reliable, long-lasting rectangular DE grid that resists deterioration from salt and chlorine.
Practical tips for best results
- Inspect end caps and center cores during every replacement cycle; Filbur’s reinforced components are designed to resist cracking and fiber fatigue.
- When swapping to FC-9820, ensure the housing is compatible with a 18" x 9-11/16" grid to preserve filtration efficiency and prevent flow restrictions.
- For saltwater pools, rinse the grid gently with low-pressure water after a heavy debris period to prolong life and maintain peak performance.
- Keep an eye on embossed part numbers for quick re-ordering—consistent replacements prevent performance dips caused by worn grids.
Upgrade with Filbur’s Rectangular DE Grid FC-9820 and experience filtration that’s built to last, with reinforced components, smarter design, and attention to real-world pool and spa needs. Clean water, easier maintenance, and dependable reliability—week after week, season after season.

