Thanks bimr
I am not a civil engineer my background is it. However, the municipality that I work for offered to provide on the job training regarding civil work. We have two civil engineers on staff and we use an engineering firm to do all design and such for our municipality.
Having said...
I have searched google and the first hit took me to this web site where there was a thread referring to this question. Call me stupid but I still do not know what residual pressure is in reference to a municipal water system.