The Zurn Z6000-YB-YC is a commercial, exposed manual diaphragm flush valve for toilets. It features a polished chrome finish, clog-resistant linear bypass, chloramine-resistant seals, ADA-compliant handle, and includes a sweat solder kit and cast wall flange. The "YB-YC" signifies the inclusion of the sweat solder kit and cast wall flange. Standard models deliver 3.5 gallons per flush (GPF), while HET (High-Efficiency Toilet) variations deliver 1.28 or 1.6 GPF.