Our best-selling retrofit kit has a new look, introducing the ZERK-SM. https://www.zurn.com/products/finish-plumbing/sensor-flush-valves/retrofit-kits/zerk-sm The EZ Flush Gen 2 Sensor Retrofit Kit is the easiest touchless upgrade for a handle-operated water closet or urinal flush valve, providing a hygienic user experience. The three-minute installation and reliable, battery-powered gear-driven technology
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