Marketing InformationZurn® automatic flush valve ztr6200-ws1 comes with 1.1 gpf providing maximum water conservation and financial savings. The dezincification-resistant brass alloy with a polished chrome finish with standard 11-1/2 in rough-in to 1-1/2 in top spud provides lasting toughness and durability. The battery-powered commercial sensor flush valve features a streamlined, piston-type design which accurately detects the user for hands-free water closet operation.