Unicel C-7656 Replacement Cartridge Filter (50 sq ft)

Part # C-7656 — a premium replacement cartridge from Unicel engineered for in-ground pool and spa cartridge filter systems. This element provides 50 square feet of filtration media with durable pleat construction for reliable clarity and long service life.

Key Features

• 50 square feet of filtration area with 108 pleats for strong dirt-holding capacity.
• Constructed with high-quality polyester filtration media for durability and chemical resistance.
• Approximate dimensions: 19 5/8″ length × 7″ outer diameter.
• Both ends open with a 3″ inner diameter for easy drop-in installation.
• Replaces several OEM cartridges including models used in Hayward Star-Clear C500, Pentair Purex CF-50, and similar filter systems.
• Rigid core and pleat design help reduce pressure rise and extend cleaning intervals.

Typical Applications

This cartridge is ideal for residential and light commercial in-ground pools requiring a 50 sq ft replacement element. It is commonly used when the system begins to show reduced flow, higher pressure between cleanings, or when the existing cartridge becomes worn, flattened, or damaged.

Installation & Compatibility Notes

Turn off the pool pump and depressurize the filter before opening the housing. Remove the old cartridge and clean the inside of the filter tank. Insert the new Unicel C-7656 cartridge, ensuring it seats properly on the manifold. Inspect the tank O-ring and lid before reassembly. Restart circulation and check that system pressure is within normal operating range.

Why Choose This Cartridge?

The Unicel C-7656 provides reliable performance with high-efficiency filtration media and strong structural integrity. It helps maintain clear water, prolong equipment life, and reduce the frequency of cleanings thanks to its optimized pleat count and sturdy construction.

Maintenance Tips

• Rinse the cartridge every 4–6 weeks or when pressure increases 8–10 psi above the clean starting point.
• Use a gentle hose spray and clean between pleats; avoid high-pressure washers.
• Perform an annual deep cleaning by soaking in a cartridge cleaning solution to remove oils and fine debris.
• Inspect pleats, end caps, and the core regularly; replace the cartridge if pleats are torn, misshaped, or heavily stained.