Description
Replacement DE filter grid sized 11 in x 18 in with 36 sq ft filtration area. Designed for use in large 18-inch diatomaceous earth pool and spa filters, it fits models from Astral, Hayward, Jacuzzi, Pentair, and Waterway. Constructed with reinforced connections and polypropylene filter cloth to provide consistent filtration and dirt retention compared with standard grids.
Quick Answer: What Is the Filbur FC-9330?
The Filbur FC-9330 is a de filter grid: Filbur 36 sq-ft 11 x 18" Large DE Filter Grid. It is brand new, ships in 1-2 business days, and is backed by the Filbur manufacturer warranty.
Filbur FC-9330 Specifications
| Brand | Filbur |
|---|---|
| Equipment Type | DE Filter Grid |
| Model Number | FC-9330 |
Key Features
- 36 sq ft filtration area
- 11 in x 18 in grid dimensions
- Reinforced connections for added strength
- Polypropylene filter cloth for consistent filtration
- Compatible with Astral Clarity DE 18045
- Compatible with Hayward Micro-Clear and Pro-Grid DEX3600DA
- Compatible with Jacuzzi Earthworks EW36 (42-2970-03-R)
- Compatible with Pentair Titan CM, RPM, FNS24, NS24 models
- Compatible with Waterway Crystal Water 818-3950
How It Works
Filter valves, replacement cartridges, D.E. grids and filter media keep an existing filter performing like new. Multiport and slide valves direct water for filter, backwash, rinse, waste and recirculate. Cartridges and grids are the filtering surfaces themselves, and media (sand, glass, zeolite or D.E.) does the filtering in sand and D.E. filters.
How to Choose the Right DE Filter Grid
- Cross-reference by the filter manufacturer and model number, then confirm dimensions: length, outside diameter, and top and bottom hole size for cartridges.
- For valves, match the filter tank thread or flange, port size and spacing.
- For media, follow the filter label for the type and pounds of media required.
- Replace grids or cartridges as complete sets for even flow.
If you are replacing an existing part, the fastest way to confirm compatibility is to match the brand and model number on the old equipment. Send us the model number or a photo of the label and our team will help confirm the FC-9330 is the right fit before you order.
Installation and Safety
Turn off the pump and release all filter pressure before opening a tank or changing a valve. Follow the filter manufacturer's instructions for O-rings, clamp torque and media fill height. Never add D.E. to a sand or cartridge filter.
Maintenance Tips
- Clean cartridges with a garden hose and soak in filter cleaner periodically.
- Check valve spider gaskets for wear if water bypasses to waste.
- Replace cracked grids immediately; D.E. returning to the pool is a sign of a torn grid.
- Keep spare O-rings on hand.
What's Included
This listing is for the Filbur FC-9330 as described in the specifications above. Plumbing, wiring, unions and accessories are not included unless they are listed in the product name or specifications.
Built for Homeowners, Pool Pros and Property Managers
- Homeowners: match your existing model number, then reach out if you want a second set of eyes on compatibility before you order.
- Pool service pros and builders: order quickly, track every shipment, and reorder common parts for your routes and builds.
- Property managers and commercial pools: standardize equipment across properties and plan replacements with help from our team.
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Frequently Asked Questions About the Filbur FC-9330
How do I find the right replacement cartridge?
Use the filter brand and model or the OEM cartridge part number, then verify dimensions on the product specifications.
How long do cartridges last?
Typically one to three seasons depending on bather load, cleaning frequency and water chemistry.
How much sand does my filter need?
Check the filter label or manual; it lists the type and pounds of media required.
Is this the genuine Filbur part?
Yes. It is brand new Filbur equipment (model FC-9330) covered by the manufacturer warranty. Warranty terms vary by product and application; see the manufacturer documentation or ask our team.
