Building a strong future on the longest-lasting infrastructure. Find out more on our Sustainability page.
2,000 Year old pipe in Ephesus Turkey
Shear load testing, circa 1963
Haunching research, 2013
Leading research in the sanitary sewer industry for over 70-years. Click here to learn more.
Using CLSM with VCP means installation at greater depths is possible –
minimizing the need for pumping stations. Find out more in our Information Center.
Average compressive strength of over 18,000 psi means VCP is unmatched in trenchless installations. See more about recent projects in our Videos & Job Profiles.
NCPI and our member-companies provide training for new installers and inspectors or crews in municipalities returning to clay. Request information
about training and PDH seminars.
The National Clay Pipe Institute is dedicated to research, education and leadership in the vitrified clay pipe sanitary sewer industry. We offer the unique perspective, history and knowledge of the longest-serving and longest-lasting pipe product available. (Don't take our word for it, click here for proof.)
Vitrified Clay Pipe (VCP) offers the longest service life available for wastewater systems. Especially among civil engineers employing asset management principles the long service life, environmentally responsible nature and structural integrity of clay are all leading to a renewed interest in VCP.
We work hard to be a reliable, credible resource for engineering firms and municipalities throughout the country. If you would like to see documentation or substantiation of anything you see on this site, please contact us.