The answer to 'what causes repiping' is that there are several common reasons a home may need repiping, including old or outdated plumbing, leaks, low water pressure, discolored water, and mineral buildup. Over time, the pipes in a home can corrode, crack, or become clogged, leading to the need for a full repipe to replace the entire plumbing system.
Repiping is often necessary when a home has galvanized steel or polybutylene pipes, which are prone to deterioration and leaks. Copper pipes can also develop pinhole leaks or mineral buildup that reduces water flow. In some cases, repiping may be required due to the presence of lead pipes, which can contaminate drinking water.