What is the purpose of a pressure reducing valve in hydronic piping systems?

The purpose of a pressure reducing valve in hydronic piping systems is to maintain a safe pressure level. This valve automatically reduces the incoming pressure of the water to a lower, manageable level that is appropriate for the system's operation. Maintaining safe pressure is crucial in hydronic systems to prevent damage to the pipes, fittings, and other components, ensuring efficient operation and safety.

Systems can experience excess pressure that may lead to leaks, bursts, or equipment failure. The pressure reducing valve helps to mitigate these risks by regulating the pressure, preventing it from exceeding levels that could compromise the integrity of the system.

While increasing pressure, dissipating water hammer, or expanding water volume may be relevant in other contexts, they do not describe the primary function of a pressure reducing valve in hydronic applications, which is focused on pressure management and safety.