Roads and bridges, airports, energy systems – all are types of infrastructure that we depend on daily to bring functionality to our lives. Yet one of these infrastructures, concrete roadway, lasts, on average, just half our lifetime before becoming worn, riddled with potholes and in need of resurfacing. Hidden beneath our feet, however, is a durable product that plays a more vital role than all of these combined: Gray cast iron and ductile iron pipe make up roughly two-thirds of the nation’s water infrastructure, and they often last hundreds of years.