Unicel 4 Sq.Ft. Fill Filter Cartridge | C-2699
Unicel 4 Sq.Ft. Fill Filter Cartridge | C-2699
Unicel 4 Sq.Ft. Fill Filter Cartridge | C-2699
Unicel 4 Sq.Ft. Fill Filter Cartridge | C-2699
Unicel 4 Sq.Ft. Fill Filter Cartridge | C-2699
Unicel 4 Sq.Ft. Fill Filter Cartridge | C-2699
Unicel Filter Cartridges and DE Grids

Unicel 4 Sq.Ft. Fill Filter Cartridge | C-2699

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$19.99
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SKU: C-2699

The Unicel C-2699 is a 4 square foot fill filter cartridge designed specifically for filtering source water during pool filling operations. This specialty filter connects directly to your garden hose with its integrated hose fitting, providing an essential first line of defense against sediment, rust, and particulate matter that can cloud new pool water or cause staining.

Specifications

Filter Area 4 sq. ft.
Length 9 3/4"
Outer Diameter 2 7/8"
Top Inner Diameter Hose Thread Fitting
Bottom Inner Diameter Sealed / Closed
Material 6 oz. Reemay 2470
Pleat Count 41
Top Cap: hose fitting
Top Cap
Bottom Cap: closed
Bottom Cap

The C-2699's professional-grade 6 oz. Reemay 2470 polyester media provides superior durability and filtration capacity compared to lighter materials. With 41 precisely engineered pleats, this filter maximizes surface area within its compact 2 7/8" diameter design, ensuring optimal flow rates while capturing particulate matter that could otherwise affect water clarity.

Application: Ideal for initial pool filling, large top-offs, or any situation where source water quality is questionable. The direct hose connection eliminates the need for additional fittings or adapters, making setup quick and reliable.

Pro Tip: Monitor water flow during use - a significant reduction indicates the filter has captured substantial contaminants and should be replaced. This disposable filter is designed for single-use applications and cannot be effectively cleaned for reuse.

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Unicel Filter Cartridges and DE Grids

About Unicel Filter Cartridges and DE Grids

The "Gold Standard" of Replacement Cartridges
For over 50 years, Unicel (Meissner Mfg.) has been the professional's choice for restoring pool water clarity. While generic "knock-off" filters often use cheap, fuzzy fabric that clogs quickly, Unicel uses genuine Reemay® Filtration Media. This patented synthetic fiber features a unique trilobal shape that traps significantly more dirt and oils without choking your pump's water flow. Based in California, Unicel doesn't just copy filter dimensions; they engineer them to strict Original Equipment Manufacturer (OEM) specifications. This ensures a "lock-tight" fit in your filter tank, preventing debris from bypassing the system and returning to your pool.

Why We Trust Unicel Filter Cartridges and DE Grids
Genuine Reemay® Media: Uses continuous trilobal fibers to capture microscopic debris without restricting water flow.

Precision "Exact Fit": Engineered to match your tank's original specifications for a 100% leak-free seal.

Made in the USA: Manufactured in California with heavy-duty urethane end caps that resist cracking under pressure.

Longer Lifespan: Sharp, rigid pleats resist collapsing during cleaning, meaning you buy fewer replacements over time.

More about Pool and Spa Filter Cartridges

Buyer's Guide: Pool and Spa Filter Cartridges

Most residential filters use either a single cartridge or a set of four (Quad). Always verify your specific tank model before purchasing.

Option 1: [The Single Replacement]

  • Best For: Smaller filter tanks or single-cartridge systems (common in many standard pools and spas).
  • Key Feature: Direct OEM fit for specific dimensions.
  • Expectations: Perfect for quick swaps. We recommend keeping a spare on hand so you can swap-and-clean without downtime.

Option 2: [The Quad-Pack Bundle]

  • Best For: Large high-capacity tanks (clean & clear style) that house 4 separate cartridges.
  • Key Feature: Complete system reset.
  • Expectations: Replacing all four ensures balanced water pressure and prevents damage to your tank's internal manifold.

Complete Your Pool Care Routine

Highly Recommended
Pool and Spa Plumbing Lubricants

Every time you open your filter tank, you must lubricate the O-ring to prevent dangerous leaks and ensure a watertight seal.

Shop Pool and Spa Plumbing Lubricants
Pro Tip: Don't Forget
Pool Test Kits and Water Analysis Tools

Balanced water pH prevents calcium scale from hardening your filter fabric and ruining your new cartridges.

Shop Pool Test Kits and Water Analysis Tools
Technician's Guide: Pool and Spa Filter Cartridges +

The "Lungs" of Your Pool

Think of your filter cartridges as the lungs of your swimming pool. Just as you need clean lungs to breathe, your pool needs clean cartridges to circulate water effectively. These pleated fabric cylinders trap dirt, debris, and microscopic particles, preventing them from clouding your water.

Over time, oils, sunscreen, and fine dust embed deep into the fabric, raising the pressure in your tank and forcing your pump to work harder. While regular rinsing helps, every cartridge eventually reaches a "point of no return" where the fabric fibers fray and the bands break.

Why Homeowners Need This:

  • Crystal Clear Water: Traps particles as small as 10-20 microns (smaller than a grain of sand).
  • Equipment Protection: A clogged filter strains your pump motor, leading to expensive burnouts.
  • Energy Savings: Clean filters allow water to flow freely, reducing the energy required to circulate your pool.
Common Questions +

Q: How often should I replace my filter cartridges?
A: Typically every 12 to 18 months (or 2-3 seasons). If you clean the filter and the tank pressure stays high (or drops very quickly after starting), the fabric is clogged and needs replacement.

Q: How do I measure for a replacement if I don't have the part number?
A: Measure the Length (end cap to end cap), the Outside Diameter (width of the circle), and the Inside Diameter of the center hole. Also, note if the ends are open or closed/threaded.

Q: Can I use a pressure washer to clean my cartridges?
A: No. High-pressure water can tear the fabric and separate the pleats, ruining the filter's ability to trap dirt. Use a standard garden hose with a spray nozzle or a dedicated filter cleaning wand.

Q: Why is my filter pressure gauge reading high?
A: High pressure indicates the filter is dirty and resisting water flow. It’s your tank’s way of screaming "Clean me!" If the pressure remains high after a deep chemical soak, it's time to buy a new cartridge.

Q: Do I need to replace all 4 cartridges in my quad-tank at once?
A: Yes. If you have a large tank with four cartridges, they wear out at the same rate. Replacing only one causes uneven water flow, which can crush the new filter and damage the internal manifold.

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