Unicel C-5396 Replacement Filter for Waterway 817-0100P | 100 Sq. Ft.

Overview

The Unicel C-5396 is a pleated polyester cartridge filter element engineered for high-capacity residential spa and swim spa applications, delivering 100 sq ft of effective filtration area through a high-pleat-count Reemay nonwoven polyester media pack. Dimensional specifications: 8.5-inch OD, 4.0-inch ID (top opening) with a 2.0-inch female SAE threaded bottom bayonet/handle interface, 15.0-inch overall length. End caps are ABS injection-molded with a closed, threaded bottom configuration incorporating an integrated tightening handle and an open-flow top mating to the housing manifold seat. Nominal filtration efficiency is rated at 20 microns under standard test conditions. The element is rated for continuous service to 115°F with intermittent excursions to 120°F, suitable for the elevated thermal and chemical loading profile of high-bather-density spa circulation systems.

Service interval recommendation for spa and swim spa applications: fresh-water rinse every 2–4 weeks; chemical soak in dilute TSP or commercial enzyme cleaner every 4–6 weeks to remove body oils, surfactants, and lotion residues that resist mechanical rinsing. ΔP replacement trigger: ≥ 5 PSI above clean-filter operating baseline. Calendar replacement interval: 12–15 months under typical residential swim spa duty cycles, reduced to 6–9 months under continuous high-bather-load conditions. Chemical compatibility: polyester fabric and ABS end caps tolerate continuous operation at ≤ 10 ppm free available chlorine or ≤ 30 ppm total bromine; muriatic acid soak compatible at 1:20 dilution (20-minute maximum exposure) for calcium scale removal, followed by thorough fresh-water rinse before reinstallation. Enzyme cleaners compatible without restriction. Verify housing O-ring condition and lubricate with silicone-based O-ring grease at each service interval; confirm post-installation pressure reading against documented clean baseline. Standard Unicel 90-day manufacturing defect warranty applies through authorized distribution.

What's Included

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