Unicel C-4305 Replacement Filter for Sundance Spas 6540-497 | 50 Sq. Ft.

Overview

The Unicel C-4305 is a pleated polyester spa cartridge filter element providing 50.0 sq ft of filtration area, engineered for high-flow Sundance Spas circulation systems and equivalent dimensional applications. Media construction utilizes Reemay nonwoven polyester at a nominal 20-micron filtration efficiency, supported on a perforated internal core for structural rigidity under spa-rated operating pressures. End cap configuration is ABS injection-molded with a top-handle/closed-bottom geometry typical of the Sundance Microclean platform, with end cap adhesive bond rated for continuous service at spa-elevated temperatures up to 115°F. The 50 sq ft surface area distributes flow across an extended pleat pack, reducing media face velocity and extending service intervals between chemical cleanings under typical residential bather loads.

Service interval recommendation: rinse with fresh water every 2–4 weeks under typical residential use; chemical soak with TSP-based or commercial enzyme spa filter cleaner every 4–6 weeks to remove accumulated oils, lotions, and surfactant residues that water rinsing alone will not clear. Replacement is recommended at 12–15 month intervals or at ΔP ≥ 5 PSI above clean-filter operating baseline, whichever occurs first. Chemical compatibility: polyester media and ABS end caps tolerate continuous service at ≤ 10 ppm free available chlorine or ≤ 30 ppm total bromine; muriatic acid soak at 1:20 dilution is compatible for calcium scale remediation (20-minute maximum exposure, followed by thorough fresh-water rinse). Verify ozone system compatibility before deployment in ozone-primary sanitization configurations. Standard Unicel 90-day manufacturing defect warranty applies through authorized distribution.

What's Included

Your order includes the selected quantity of replacement spa filter cartridges. Each unit is individually inspected for quality before shipping.