J.C. Whitlam FLOW32 Flow-Aide System Descaler ,32 ounces (1 quart) Non-Corrosive, Non-Toxic, Fully Biodegradable, Safe to Handle, Zero VOC Quickly dissolves water scale, lime rust and other water formed deposits, restoring efficiency to most all appliances Certified to NSF/ANSI 60 for use as a cleaner in potable water systems 32oz bottle (1 quart)