Free pump system software made available by the EPA

The Environmental Protection Agency of the United States has made available this free software for doing pump system calculations, visit this web site for the download:
https://www.epa.gov/nrmrl/wswrd/dw/epanet.html

The software is intended to model municipal water systems but I believe it can alsobe used typical industrial or home systems. I am checking that as we speak (March 2, 2013).

Well the good news is that this software is fairly sophisticated, the bad news is that it is not well adapted for use with the systems mentionned above.

There is a good tutorial on how to use it on youTube:
https://www.youtube.com/watch?v=Ac36MoQFqzw