The answer to 'how long does water line last' is that the lifespan of a water line can vary greatly, but on average, a well-installed water line should last between 50-100 years. The material of the water line is a key factor, with copper and PEX pipes typically lasting the longest. Factors like water quality, soil conditions, and installation quality can also impact the water line's longevity.
It's important to have your water lines inspected regularly by a professional plumber, especially if your home is older. They can assess the condition of the pipes and identify any potential issues before they become major problems. Proactive maintenance and prompt repairs can help extend the life of your water lines and avoid costly water damage down the road.