The ZW4000GST-U 2-1/2" Pressure-Tru Pressure Reducing Fire Hose Valve with grooved inlet connection, specified hose thread, and 200 psi (U bonnet type) max inlet pressure is utilized as a standpipe valve for individual hose stations in both CLASS I and CLASS III system applications. It regulates pressure under a variety of flow and no-flow conditions, and includes a factory set grooved inlet and male hose (NH) thread with multiple available options for special hose threads. Other features include a factory set outlet pressure setting and a maximum inlet pressure setting of 400 psi, tapped and plugged for pressure gauge. The ZW4000G comes standard with cast bronze castings and internals, with an option for a rough chrome finish.