Unicel FS-2004 48 Sq Ft DE Filter Grid Set – Complete 8-Piece Replacement
Restore your pool's filtration system to peak performance with the Unicel FS-2004 48 Sq. Ft. DE Filter Grid Set – the gold standard in replacement filter grids trusted by pool professionals and homeowners alike. This 8-piece grid set is made for durability and precision. It fits most 48-square-foot DE (diatomaceous earth) pool filters. This includes top brands like Hayward Pro-Grid, Micro-Clear, and Pentair FNS Plus (formerly Pac-Fab)
When your DE filter is not making the water clear like before, it's time to replace the filter grid assembly. This is especially true if the internal grids show wear, sagging, or fraying. The Unicel FS-2004 makes this process easy and effective. It has 7 full-size DE grids and 1 partial grid. Each grid is designed to meet OEM standards. They are made from high-quality materials that resist pressure, bending, and chemical damage.
If you are replacing an old filter grid set or upgrading from a cheaper option, this set works well. It provides long-lasting performance and improves pool clarity, DE efficiency, and ease of maintenance.
Engineered for Peak Pool Performance
Each grid in the FS-2004 set is made to work under high pressure. It has a strong, reinforced polypropylene frame. The fine mesh polyester fabric captures tiny debris while letting water flow freely. The result is better DE powder retention and more consistent filtration. This helps remove particles as small as 2 to 5 microns from your pool water.
This improved grid design lowers pump strain, reduces pressure build-up, and keeps your pool cleaner for longer. You will need fewer backwashes or chemical adjustments. It also supports longer filter cycles, which helps conserve water and reduce operational costs.
Trusted Compatibility with Leading Filter Systems
The Unicel FS-2004 grid set is one of the most widely compatible 48 sq. ft. DE grid replacements on the market. It is purpose-built for DE filters that require 24" grids, making it an ideal fit for:
- Hayward Pro-Grid DE4820
- Hayward Micro-Clear DE4800
- Pentair FNS Plus 48 (FNSP48)
- Pentair Pac-Fab DE Filters
- Sta-Rite and American Products DE Filters (48 Sq. Ft. models)
With perfectly matched sizes and easy installation, there’s no guesswork. Just enjoy the drop-in replacement convenience for your manifold and tank.
Cleaner Water, Less Work
Your pool’s clarity is directly tied to the performance of your DE filter—and that means your filter grids matter. The Unicel FS-2004 is designed for better DE distribution across all eight grids. This helps create an even coating and maximizes the usable surface area.
This grid set ensures:
- Cleaner, clearer water
- Improved DE efficiency
- Less frequent recharging
- Lower risk of clogging
- Faster water turnover
- Reduced energy consumption
When your filtration system works better, you spend less time maintaining your pool and more time enjoying it.
Heavy-Duty Construction You Can Rely On
The FS-2004 is strong and durable. It is made to last for years, even in tough conditions. Other aftermarket grid sets may use thin frames or weak mesh that can break easily. Each grid includes:
- Reinforced frame structure that resists flexing or collapsing under pressure
- Rigid vertical supports to prevent folding or sagging
- Precision-molded ends for secure, leak-free fitment
- High-flow mesh fabric that retains DE powder without clogging prematurely
- Chemical-resistant materials that hold up against chlorine, acids, and pool shock treatments
The Unicel FS-2004 has great build quality. This makes it a perfect choice for busy residential pools, rental properties, apartment complexes, and commercial facilities. It provides reliable, professional-grade filtration.
Effortless Installation and Maintenance
Whether you’re replacing your filter grids for the first time or you do this every season, the FS-2004 simplifies the process. Each grid is pre-sized and shaped to OEM specs. This means it fits right into your manifold and filter housing. No trimming, cutting, or bending is needed.
Installation Steps:
- Turn off your pool pump and depressurize the DE filter.
- Remove the filter lid and take out the internal manifold and old grids.
- Rinse or inspect the manifold as needed.
- Insert each new grid into the correct position—7 full grids and 1 partial.
- Reconnect the manifold and secure the filter lid.
- Recharge with DE powder per manufacturer specs.
Maintenance Tips:
- After backwashing, recoat your filter with fresh DE powder.
- Rinse the grids every few months to remove residual oils and debris.
- Inspect for damage annually and replace when fraying, folding, or DE leaks occur.
The FS-2004 grids are easy to rinse clean using a garden hose or dedicated cartridge grid cleaner. Their rigid design makes them resistant to folding during cleaning, which helps extend their usable lifespan.
Key Features
- Complete 8-Piece Set: Includes 7 full-length (24") grids + 1 shorter partial grid for a full 48 sq. ft. of filtration.
- Universal Compatibility: Works with top DE filters from Hayward, Pentair, Pac-Fab, and others.
- OEM-Quality Fitment: Precision-molded ends match factory specs for easy, drop-in installation.
- Heavy-Duty Frames: Reinforced internal supports and chemical-resistant materials resist collapse and breakdown.
- Superior DE Coverage: Uniform grid spacing ensures optimal DE powder distribution and clearer water.
- Increased Filter Cycle Length: Reduces the need for frequent backwashing and DE recharges.
- Improves Water Clarity: Removes particles as small as 2 microns for crystal-clear water.
- Trusted by Professionals: A preferred choice for pool service companies and residential DIYers.
- Made in the USA: Manufactured with strict quality control and premium-grade materials.
Why Pool Owners and Technicians Choose Unicel FS-2004
When it comes to filter grids, not all replacements are created equal. With the Unicel FS-2004, you’re investing in peace of mind and long-term performance. These grids are better than lower-quality ones. They last longer and provide steady filtration. They also offer better protection for your pool equipment.
Top reasons customers choose the FS-2004:
- Outlasts cheaper brands with higher durability
- Compatible with multiple filter brands and models
- Improves pump performance by reducing resistance
- Reduces chemical usage through better water balance
- Backed by decades of Unicel filtration expertise
Product Specifications
| AttributeDetail | |
| Brand | Unicel |
| Model Number | FS-2004 |
| Total Grid Count | 8 (7 Full + 1 Partial) |
| Filtration Surface Area | 48 Square Feet |
| Full Grid Length | 24 Inches |
| Frame Material | High-Strength Polypropylene |
| Mesh Fabric | Reinforced Polyester |
| Filter Type | DE (Diatomaceous Earth) |
| Compatible With | Hayward, Pentair, Pac-Fab, Sta-Rite |
| Application | In-ground DE Pool Filters |
| Installation | Drop-In, Tool-Free |
| Country of Origin | USA |
| Warranty | 1-Year Limited Warranty |
Frequently Asked Questions (FAQs)
Q: What’s the difference between full and partial grids?
A: Full grids are the long 24" panels that make up the majority of the filtration area. The partial grid is a shorter panel that fits next to the manifold and completes the circle of grids in a DE filter.
Q: Do I need to buy anything else to install this set?
A: No. This 8-piece set is a complete replacement grid assembly. You’ll just need fresh DE powder to recharge your filter after installation.
Q: How often should I replace my DE filter grids?
A: On average, every 5–7 years. You should replace sooner if you notice fraying fabric, collapsed panels, broken frames, or DE leaking into the pool.
Q: Will this set fit my Hayward DE4820 filter?
A: Yes! The FS-2004 is a perfect fit for the Hayward Pro-Grid DE4820, one of the most common 48 sq. ft. DE filters on the market.
Ideal For
- Homeowners looking to improve water clarity and filtration performance
- Pool professionals conducting seasonal maintenance or filter rebuilds
- Commercial properties needing high-efficiency DE filtration
- Anyone replacing worn or collapsed grids in 48 sq. ft. DE filter systems
Shop With Confidence at Benchmark Pool Supply
At Benchmark Pool Supply, we don’t just sell pool parts—we stand behind every product we offer. The Unicel FS-2004 is stocked and shipped from our California warehouse with fast, reliable service and expert support. If you have questions about compatibility, installation, or filter performance, our pool professionals are here to help.
We proudly serve pool owners across the U.S. with fast shipping, great prices, and expert advice—online and in our Fresno and Clovis stores.
