What common sign might suggest a plumbing issue in a home?

Persistent odors or dampness can indeed suggest a plumbing issue in a home due to the potential presence of leaks or water buildup. When plumbing systems develop leaks, water can escape into areas not meant to hold moisture, leading to dampness that may be felt on walls, floors, or under sinks. This dampness often creates a conducive environment for mold growth, which can produce musty odors that are noticeable throughout the home.

In contrast, sudden changes in temperature might indicate HVAC problems rather than plumbing issues, while frequent power outages are related to electrical systems. Visible cracks in the foundation can suggest structural issues or drainage problems, but they are not directly indicative of plumbing failures. Therefore, persistent odors or dampness is the most direct sign indicating that plumbing problems may be present.