The 2-1-2" ZW4004GSS-S Pressure-Tru® Pressure Reducing Valve with grooved inlet and outlet connections and max inlet pressure of 250 psi (S bonnet type) is utilized as a floor control valve, indicating valve, and check valve in automatic sprinkler systems, and as a standpipe valve for CLASS I and CLASS III system applications. It is suitable for both indoor and outdoor use, and regulates pressure under a variety of flow and no-flow conditions. The ZW4004SS includes a built-in listed supervisory switch. Its tamper-resistant housing can be rotated for easy wiring with a switch rated at 3 amps at 125 VAC, a maximum inlet pressure of 400 psi, and a tapped and plugged inlet and outlet for pressure gauge.