Vaillant Prv, 3 Bar 20275015

The pressure relief valve (PRV) in a heating system, such as a boiler, is a critical safety component. It's designed to release excess pressure from the system if it becomes too high. This prevents the system from becoming dangerously pressurized and potentially causing damage or even explosions.3 bar is a common pressure reading in heating systems, indicating 3 times atmospheric pressure.