1. The problem statement, all variables and given/known data 2. Relevant equations Provided above 3. The attempt at a solution Piezometric head is defined as the pressure head plus the elevation head, correct? But how does having a high piezometric head tell you about the fluid flow? Since the diameters are equal, the area's are equal, hence velocities are equal. But how do I show the direction of flow without putting in any numerical values?