Cities facing water main replacement or rehabilitation should consider cured-in-place piping (CIPP), which offers minimal disruptions and is less expensive than many other methods. Hundreds of towns and cities have already discovered the benefits of trenchless CIPP. EACH DAY, an estimated 850 US water mains fail because of age, breaks, or leaks. If the trend continues, cities and towns will need an estimated $200 billion to repair or replace aging water mains in the next decade.