About the Industry

Founded in 1915, the Ductile Iron Pipe Research Association (DIPRA), has provided a variety of resources such as publications, videos, reliable engineering information, case studies and research, and personal technical services through our Regional Engineer Program.

The History of Ductile Iron Pipe

Since 1955, Ductile iron pipe has been recognized as the industry standard for modern water and wastewater systems. More than five decades of field experience has proven its strength, durability, and reliability.

Differences Between Cast Iron & Ductile Iron Pipe

Ductile iron pipe is flexible, durable, and lasts longer compared to cast iron pipe.

The Production Process

The industry’s most stringent design & manufacturing standards, coupled with exacting quality control measures by Ductile Iron manufacturers, ensure the pipe’s integrity.

Benefits of Ductile Iron Pipe

Ductile iron pipe is resilient, safe, and reliable – with a service life of over 100 years. It is an environmentally superior pipe due to its longer service life, resilience, energy savings while in service, recycled content, and its own recyclability.