What is a common indicator of a plumbing leak?

A common indicator of a plumbing leak is the presence of wet patches on walls or floors. These patches can signal that water is escaping from pipes or fixtures, which can lead to water damage and mold growth if not addressed promptly. The physical evidence of moisture on surfaces makes it one of the most noticeable signs of a leak.

Increased water temperature is generally not associated with leaks but might indicate another issue, such as a malfunctioning hot water system. Changes in water pressure can indicate a leak as well, but they may also occur due to other plumbing system issues or normal fluctuations. Higher water bills can also be a sign of a leak; however, it is a less direct indicator compared to visible wet patches that provide immediate evidence of water escape. Therefore, while other options may hint at potential leaks, wet patches on walls or floors directly reflect the impact of a plumbing issue.