Unicel FS-2004 – 48 Sq Ft DE Filter Grid Set

Restore Peak Filtration & Keep Your Pool Crystal Clear

When your pool water starts to look cloudy and your filter is struggling to keep up, the culprit is often worn-out or clogged filter grids. The Unicel FS-2004 48 Sq Ft DE Filter Grid Set is the ultimate solution—an all-in-one, 8-piece OEM-quality replacement kit designed to fully restore your DE filter’s efficiency.

Compatible with leading DE filter brands such as Pentair, Hayward, and Pac-Fab, this set is engineered to match original specifications for a precise fit, effortless installation, and season-after-season reliability.

At Benchmark Pool Supply, we’ve seen firsthand how the FS-2004 delivers superior results. Whether you’re a pool professional servicing multiple clients or a homeowner who demands sparkling water, this DE grid set will revolutionize your filtration performance.

---

Why the FS-2004 is a Game-Changer for Your Pool

Replacing just one or two damaged grids might get your filter running again, but it can lead to uneven filtration, poor water flow, and frequent maintenance. The FS-2004 solves this problem by replacing all eight grids at once, ensuring balanced performance and even wear across your entire filter.

Here’s why upgrading to this complete set is a smart investment:

1. High-Efficiency Filtration – 48 Sq Ft of Surface Area

With a 48 square foot filtration area, the FS-2004 traps more dirt, silt, algae, and debris than standard filter media. The Reemay® spunbond polyester captures particles as small as 2–5 microns, far smaller than what sand or cartridge filters can achieve.

This means:

• Pristine water clarity after each cycle

• Reduced chemical usage because contaminants are filtered out more effectively

• Fewer filter cleanings since each grid holds more debris before clogging

---

2. Complete 8-Piece Set for Full Replacement

The set includes everything you need for a complete refresh:

• 7 full-size DE grids (24" length)

• 1 partial-size DE grid (24" length)

By replacing all eight grids, you restore your filter to like-new condition—ensuring water flows evenly and eliminating weak points caused by mismatched or worn grids.

---

3. Built to Last – Premium Materials

Unicel is known for uncompromising quality. The FS-2004 uses:

• Rigid polypropylene frames that resist warping under high pressure

• Chemical-resistant Reemay® fabric to withstand years of chlorine, DE powder, and pool water exposure

• Precision seam welding for structural integrity even under backwashing force

These grids aren’t just replacements—they’re an upgrade in durability over many OEM models.

---

4. Perfect OEM Replacement

The FS-2004 is engineered to match original dimensions and connections, making installation a breeze. It directly replaces the following OEM part numbers:

• Pentair FNS & FNS Plus: 59023400, 59023500

• Hayward Pro-Grid: 59204500, 59204600

• Pac-Fab Nautilus: Multiple compatible 48 Sq Ft models

• Any other DE filter equivalent to the FS-2004

---

5. Immediate Benefits You’ll Notice

Once installed, you’ll quickly see why professionals recommend the FS-2004:

• Water clarity dramatically improves within a single filter cycle

• Backwashing frequency decreases, saving water and DE powder

• Pump strain is reduced thanks to balanced, unrestricted flow

• Pool stays cleaner for longer between maintenance cycles

---

Technical Specifications

---

Expert Installation Tips from Benchmark Pool Supply

We’ve helped hundreds of customers install FS-2004 grids, and here are our pro tips for success:

1. Turn Off Power First – Always shut down your pump and release pressure from the system before opening the filter tank.

2. Inspect the Manifold – Before inserting new grids, check the manifold for cracks or warping. Replace if needed to ensure a proper seal.

3. Install in Correct Order – Arrange the 7 full grids and 1 partial grid exactly as your manufacturer’s diagram shows for proper flow.

4. Use a Light DE Coat – Once assembled, add fresh DE powder per manufacturer’s instructions to start filtering at peak performance.

5. Rinse at Season’s End – At closing time, hose off your grids and store them dry for maximum lifespan.

---

Real-World Performance – Our Experience

At Benchmark Pool Supply, we’ve field-tested the FS-2004 in both residential and commercial pool systems. The results are consistent:

• Pools maintain crystal-clear clarity even during heavy use

• Filtration remains strong for months before cleaning is needed

• Customers report lower chlorine costs due to improved filtration efficiency

When you pair this grid set with proper water chemistry and regular maintenance, you’ll enjoy an easier, more enjoyable pool ownership experience.

---

Common Pool Filter Issues the FS-2004 Solves

If you’ve noticed any of the following, your filter grids may need replacement:

• Cloudy water even after running the filter for hours

• DE powder returning into the pool through returns

• Visible tears or fraying in the grid fabric

• Uneven water flow or “dead spots” in filtration

• Frequent need to backwash or recharge DE

Installing a complete, matched set like the FS-2004 corrects these issues immediately.

---

Complementary Products

For best results, pair your FS-2004 with:

• Poolife DE Filter Powder – High-quality DE media for maximum clarity.

• Pentair FNS Plus Filter Manifold – Replace worn manifolds for leak-free operation.

• Pentair Filter O-Ring Kit – Ensure a perfect seal to prevent bypass.

---

Frequently Asked Questions (FAQ)

Q: How often should DE grids be replaced?
A: Typically every 5–7 years, or sooner if you see tears, fraying, or significant clogging.

Q: Can I replace just one or two grids?
A: You can, but for optimal performance, replacing all eight at once ensures balanced flow and even wear.

Q: Does the FS-2004 fit my filter?
A: If you have a 48 Sq Ft Pentair FNS/FNS Plus, Hayward Pro-Grid, or Pac-Fab DE filter, it will fit perfectly.

Q: How much DE powder do I need after installation?
A: For a 48 Sq Ft DE filter, use approximately 6 lbs (check your manufacturer’s recommendation).

Q: Is Reemay® better than generic fabric?
A: Yes—Reemay® offers superior dirt-trapping ability, chemical resistance, and longer life compared to generic fabrics.

---

Why Buy from Benchmark Pool Supply?

• Authorized Unicel Dealer – 100% authentic replacement parts.

• Fast Shipping – Direct from our Fresno, CA warehouse.

• Expert Support – Real advice from pool care professionals.

• Competitive Pricing – OEM quality without inflated markups.

---