Hi Folks, It seems there are some differing opinions in my office with respect to the following. If one is to pump water through a long lenth of 1.75" pipe (16000'), how would you go about predicting the temp rise of the water as it flows along the pipe? From what we have found, when pumping at roughly 7000PSI @ 2.5 BPM we have a significant increase, but it seems we are not able to accurately predict precise values. The fluid is straight H2O, and is de-gassed. I know this is a simple problem ,but with all the bickering Ive had with my colleauges, I thought I would ask here! Thanks everyone for the excellent site!