What is a common indicator of a leak in a boiler?

Water pooling below the boiler is a common and clear indicator of a potential leak. When a boiler develops a leak, the water or steam can escape from the system, often resulting in visible water accumulation in the area surrounding the boiler. This pooling can indicate that there is a breach in the system's integrity, whether in the boiler's structure itself, the piping, or fittings that connect the various components of the heating system.

While increased pressure, higher than normal steam output, and a decrease in burning efficiency can signal other issues within the boiler system, they do not directly suggest a leak. Increased pressure may indicate a blockage within the system or failed pressure relief mechanisms, while higher steam output could imply that the boiler is operating above its design parameters. A decrease in burn efficiency may point to combustion issues or fuel supply problems, but again, these are not direct indicators of a leak. Therefore, the presence of water pooling is a reliable and observable sign that signifies the need for immediate inspection and maintenance to address potential leaks in the boiler system.