What does the pressure reducing valve do in a hot water heating system?

The pressure reducing valve plays a critical role in a hot water heating system by regulating the water pressure of the incoming water supply. This valve is designed to lower and maintain the pressure of water entering the heating system to a safe and suitable level, ensuring that the components of the system, such as the boiler and piping, function effectively without the risk of damage due to excessive pressure.

Maintaining an appropriate incoming pressure is essential for optimal operation, as too high a pressure can lead to leaks, equipment failure, and safety hazards. While other choices may address various aspects of the heating system, the key function of the pressure reducing valve revolves specifically around managing the incoming water pressure, which is vital for the overall safety and efficiency of the system.