Ductile Iron Pipe Hazen-Williams Flow Coefficient Declines Over Time

Welcome to John’s Blog. Answers to frequently asked questions are periodically posted here. The objective is to share information about PVC pipe with readers as well as with utilities, design engineers and pipe installers. The blog provides the latest information on PVC pipe design, installation, and application for water and wastewater infrastructure projects.

If you are interested in having the response to your question considered for posting,
e-mail John at techblog@uni-bell.org

We encourage you to connect to John’s Blog by bookmarking this page or by connecting our Technical Blog to your RSS feed program.

John Houle: Senior Technical Consultant, PVC Pipe Industry

John Houle holds a Master’s Degree in Civil Engineering from the University of Missouri and an MBA from the University of Oregon. He has more than 25 years of experience in the plastic pipe industry in applications engineering, market development, forensic analysis, technical writing, and standards development.

Sample Specifications for PVC Water and Sewer Pipes

Posted By John Houle on Feb 25, 2019

The Uni-Bell PVC Pipe Association has recently published sample specifications for water and sewer pipes. Specifications are provided for three project types:

  1. Potable water
  2. Gravity sewer
  3. Sewer forcemains

The specifications are offered in a layout similar to MasterFormat 2016, which is convenient to use, can be easily integrated into existing specifications, and includes helpful tips for both new and long-time PVC pipe specifiers. Designers can enter project-specific information into the sample PVC pipe specifications, reducing time and effort, as well as use them for updating master specifications.

These sample specifications are in MSWord format which streamlines the process of developing new internal specifications or updating existing ones. The model specs also include up-to-date references to ASTM and AWWA standards (for example, the larger sizes of AWWA C900 pipe). Also included is helpful information on the design, manufacturing, and installation of PVC pipe. If your employer or client is currently using or considering using PVC pipe, these model specifications can be of great help.

Click here for the sample specifications.