Unicel UHD-SR50 Replacement Filter for Sta-Rite WC108-56S2X | 52 Sq. Ft.

Overview

The Unicel UHD-SR50 is a heavy-duty pleated polyester cartridge filter element engineered as a direct replacement for the Pentair/Sta-Rite WC108-56S2X System:3 modular media filter, providing 52.0 sq ft of filtration area through a high-pleat-count Reemay nonwoven polyester media pack. Construction features molded end caps with a closed-bottom, open-top flow geometry and a reinforced polypropylene core sized for the System:3 manifold standpipe. Nominal filtration efficiency is rated at 20 microns under standard test conditions, with continuous service rated to 104°F and operating pressures to 50 PSI consistent with System:3 housing specifications. The UHD-SR50 is engineered for the modular pair configuration used in System:3 SM and SMD housings, where two elements operate in parallel to deliver the rated total filtration area for the assembly.

Service interval recommendation for residential installations: chemical soak with enzyme or TSP-based cartridge cleaner every 3–6 months; replacement on an annual cycle or at ΔP ≥ 8–10 PSI above clean-filter operating baseline, whichever occurs first. Commercial and high-bather-load installations should follow a 30–90 day inspection cycle with ΔP logged per local health code requirements. Verify manifold O-ring condition and lubricate with silicone-based pool lubricant at every element service; perform post-installation pressure verification before returning the system to operation. Chemical compatibility: polyester fabric and end cap construction tolerate continuous service at ≤ 10 ppm free available chlorine; muriatic acid soak at 1:20 dilution compatible for calcium scale removal (20-minute maximum exposure, thorough rinse required); enzyme cleaners compatible without restriction. 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.