The answer to 'how to fix repiping' is that repiping, or replacing the entire plumbing system in a home, is a major project that is best handled by a professional plumber. Repiping involves completely removing and replacing all the water supply pipes in a home, which can be a complex and labor-intensive process.
Repiping is typically recommended when a home's plumbing system has reached the end of its lifespan, usually 50-70 years, and is experiencing persistent issues like leaks, low water pressure, or contaminated water. It's an important investment to ensure the safety and reliability of a home's plumbing.