At what pressure is a Pressure Regulating Valve (PRV) required?

A Pressure Regulating Valve (PRV) is typically required when the pressure in a system exceeds a certain threshold, which is important for maintaining safety and functionality in a fire protection system. The specific pressure threshold of 100 PSI or more serves as a critical point at which excessive pressure can lead to component failures or leaks in the piping system.

At this level of pressure, the potential for structural stress on pipes and fittings increases significantly, which could compromise the integrity of the system. As indicated by various fire codes and standards, including NFPA guidelines, a PRV is implemented to reduce the incoming pressure to a safe and manageable level, ensuring that equipment operates effectively without being subject to undue strain. Therefore, having the requirement set at this pressure ensures that systems are adequately protected, promoting reliability and safety in fire prevention measures.