Frequently Asked Questions

After more than 100-years of research, and thousands of years of
experience with clay pipe, we're here to help answer your questions.

Clay Pipe has significantly improved through the years. 

Our safety rating is among the best in the industry and well below the nationwide industry average.

Yesterday’s Clay Pipe has a long history of solid performance and much of the pipe installed over 100-years ago is still in service and in great shape today.  Today’s Clay Pipe is fired at 2000°F (1100°C).  At this temperature, vitrification occurs as the clay mineral particles become fused into a chemically inert and stable material.

Today’s Clay Pipe has high bearing and compressive strength and is unique in its corrosion and abrasion resistance.  The high quality of Vitrified Clay Pipe (VCP) is maintained in accordance with Standards issued by the American Society for Testing and Materials (ASTM). VCP is has the longest, richest history of any sanitary sewer pipe material available. Innovations over the years built on that extensive history.  That means VCP is a proven material and it’s here to stay…forever!

Need more assistance?  contact us today

For information about safety factors of various bedding classes, a least cost analysis or flow calculations, visit the Toolbox page of the NCPI website. We also offer a variety of free workshops on the design and installation of VCP.  We can also arrange tours of our manufacturers’ facilities. Contact us to discuss your specific areas of interest.