The answer to 'why is my repiping' is that your home's plumbing system may need to be replaced or updated. Common causes for repiping include old, corroded pipes, leaks, low water pressure, or discolored water. Symptoms can include frequent clogs, water damage, or even burst pipes.
Repiping is a major home improvement project that involves replacing all the water supply pipes in your home, usually from the main water line to each fixture. This is often necessary when the existing pipes have reached the end of their lifespan, typically 50-80 years for galvanized steel pipes or 20-40 years for copper pipes. Repiping can be a complex and disruptive process, so it's best left to professional plumbers who have the right tools and expertise.