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Customer Testimonials:

"The residents loved your classes. I heard them laughing all the way down the hall."

Melanie Rogers
Program Director,
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Williams Testing has helped solve some of the most difficult and challenging pipe deflection problems in the United States. The company has also conducted pioneering research and testing in the field. On this page you’ll find information, photos and detailed reports on a number of our projects.


This third-party report has been prepared to provide both engineering and construction data for rerounding PVC pipe with the WilliamsSM RerounderTM System. It documents testing performed in our test cell that is shown in the videos. Get a copy of the complete report by filling out the contact form on the right. 





Rerounding of four leachate riser pipes and installation of stainless steel liners. Watch the video below.

LAFAYETTE, OH – Sewer Project

In July of 1980, a 288 foot section of the newly constructed 8" SDR-35 sewer main in
Lafayette, OH failed to meet the 5% deflection test. The Williams crew Rerounded
the section of pipe and it subsequently passed the mandrel test.

In a follow-up test two years later, project engineer Henry Hollinger, P. E. of Kohli &
Kaliher Associates indicated that the section had passed the deflection test and that
the "bedding and trench conditions had been stabilized by the Rerounding process
and no further deflections should be expected.”

Later, as a longevity check, James Myers, P. E., also of Kohli & Kaliher Associates,
reports that in February 2006, after 26 years, the section of pipe still passed a 4%
deflection test. Click here to read full report.

BRENTWOOD, CA – Sewer Project 

In 1990, a 764' section of 36" HDPE Pipe failed to meet a deflection test. Television inspection showed several joint leaks prior to the Rerounding process. Following Rerounding, all sections of the pipeline passed the mandrel test using a 5 percent mandrel.

Follow up tests eight years later showed the rerounded sections of pipe appeared to have minimal deflection with no systematic deflection of the pipe joints. Click here to read full report.