On a hot water boiler, what does the pressure gauge indicate?

The pressure gauge on a hot water boiler is an essential instrument that monitors the pressure within the system. It provides critical information regarding the operating conditions of the boiler, specifically how much pressure is being exerted by the hot water in the system. This pressure is crucial for ensuring that the boiler operates efficiently and safely, as it helps to determine whether the system is functioning within its designed parameters.

Maintaining the correct pressure is vital because it affects the temperature at which water boils and the overall efficiency of the heating process. If the pressure is too low, the boiler may not effectively heat the water, leading to inadequate heating for the facility. Conversely, if the pressure is too high, it poses a risk of safety hazards such as leaks, ruptures, or other failures in connected piping and equipment.

Understanding that the pressure gauge indicates pressure helps operators monitor system performance, troubleshoot issues, and maintain safety standards in boiler operation. Other options relate to different aspects of boiler operation but do not accurately reflect what the pressure gauge specifically measures.