When properly designed and installed, plumbing systems will provide many decades of problem-free service. Careful corrosion engineering management, including attention to details such as materials selection, fluid mechanics, water-chemistry control, protective coatings, cathodic protection, and suitable material corrosion allowance, should ensure these materials comfortably survive their design life. However, actions during the construction or renovation of a building can have unintended consequences that can dramatically reduce the service life of plumbing systems.