Apollo RPZ Backflow Preventers Top-mounted test cocks.Meet ASSE 1013, USC, FCCCHR, and AWWA 511; UL Classified, when ordered without ball valves. Max. pressure: 175 psi, Max. temp: 180°F Bronze body, Air Gap Drain Kits Funnel minor relief valve discharges into the drainage system. Threaded connections. Meet ASSE 1013, USC, FCCCHR, and AWWA 511; UL Classified, when ordered without ball valves.