Unicel C-5396 Replacement Filter Cartridge – 100 sq ft
Part # C-5396 — a high-capacity replacement filter cartridge designed for spas and pools that use a 100 sq ft filtration element. This cartridge restores proper water flow, improves clarity, and helps maintain clean, balanced water by capturing fine debris and contaminants.
Key Features
- 100 sq ft of premium polyester filter media for strong dirt-holding capacity.
- Standard size: approximately 5-5/16″ outer diameter × 21-5/16″ length.
- Open-top and open-bottom design with 2-1/8″ inner diameter ports for easy installation.
- High pleat count for extended run time and improved filtration efficiency.
- Durable center core and reinforced end caps designed for long service life in both pool and spa environments.
Typical Applications
This replacement cartridge is commonly used in spa systems, portable hot tubs, and small residential pool filters that require a 100 sq ft element. Replace when the existing cartridge becomes worn, clogged, torn, or unable to maintain proper pressure and water clarity.
Installation & Compatibility Notes
Shut off the pump and release system pressure. Remove the old cartridge from the filter housing, clean the tank thoroughly and inspect the sealing surfaces. Insert the new C-5396 cartridge, ensuring proper alignment and seating. Reassemble the filter, restore circulation, and confirm normal operating pressure.
Why Choose This Cartridge?
The C-5396 offers reliable performance, long-lasting construction and a large filtration surface area, making it an ideal choice for restoring efficient filtration without replacing the entire filter system.
Maintenance Tips
- Clean the cartridge whenever system pressure rises 8–10 psi above the clean starting pressure.
- Rinse thoroughly with a hose and periodically deep-clean using a cartridge-safe solution to remove oils and scale.
- Inspect end caps and pleats regularly for cracks, tears or deformation.
- Consider rotating between two cartridges to prolong lifespan and reduce downtime during cleaning.
