The answer to 'lifespan of repiping' is that a properly installed and maintained whole-home repiping job can last 50-80 years or more. Repiping involves replacing all the water supply pipes in a home, usually with more durable materials like copper, PEX, or PVC. This extensive project has a long lifespan because the new pipes are not subject to the same corrosion, mineral buildup, and other issues that can degrade older galvanized steel or lead pipes over time.
However, the actual lifespan can vary depending on factors like the quality of the materials and installation, water quality, and maintenance. Homes in areas with hard water or other mineral-rich water may need repiping more frequently. Regular maintenance like flushing the water heater and using water filters can also help extend the life of repiped plumbing systems.