Specifying a Pressure Reducing Valve: Set Pressure, Fall-Off, Cv and the Two Numbers a Datasheet Can Leave Off
Most PRV mistakes start with the pipe size: a 3/4 in line gets a 3/4 in valve, and nobody checks it at peak flow. Specify a pressure reducing valve by flow instead. Name a set pressure at or below the 80 psi static ceiling in IPC 604.8 and UPC 608.2, the fall-off at your design










