What might be a visible indicator of corrosion in pipes?

Corrosion in pipes often results in the leaching of metal particles or rust into the water supply, which can visibly manifest as discolored water. The appearance of red or black water is a common indicator of corrosion; red water usually suggests the presence of iron rust from iron or steel pipes, while black water may indicate manganese or other particulate matter from pipes corroding. This discoloration can be alarming for consumers and is a clear sign of potential issues with the plumbing infrastructure, warranting immediate attention to prevent further deterioration and potential health risks associated with consuming contaminated water.

As for the other choices, a shiny exterior might indicate a newer pipe or that it has been recently cleaned, while clear water typically indicates that the water is free from visible contaminants and suggests that there is no significant corrosion occurring. High water pressure does not directly correlate with corrosion; in fact, it often suggests that the system is functioning well without leaks, which may not be reflective of the condition of the pipes themselves.