Hose valve, 2 ½" F. NPT inlet x 2 ½" F. NPT outlet. Used to regulate and control high pressures in standpipe and sprinkler systems. Constant pressure regulation under residual (flowing) and static (non-flowing) conditions. Tamper-resistant pressure adjustment setting. Bonnet tab indicates valve position as "open" or "closed". Valve seat acts as checking device and closes when inlet pressures drop below selected static outlet pressures. Angle type, cast brass body with brass and stainless steel internals. Large operating handwheel. UL listed to 400 psi.