The answer to the lifespan of water line replacement is that a properly installed water line can last 50-100 years or more. The actual lifespan depends on factors like the material used, soil conditions, and proper maintenance. Copper and PEX lines tend to last the longest, while galvanized steel and polybutylene lines have a shorter lifespan of 20-50 years.
It's important to have a professional plumber assess your home's water lines and replace them if they are showing signs of wear, corrosion, or leaks. Catching issues early can prevent major water damage and expensive repairs down the line.