in a pipe network analysis problem, when comparing the heads between the two adjacent points, when writing the energy equation, they took into account only the elevation and pressure heads. why didnt they take velocity head into account?



This is the question In the 13th edition of practice problems for civil engineering PE exam, on page 17-21 (solution to problem 17-11), when writing the energy equation, they took into account only the elevation and pressure heads. why didnt they take velocity head into account?