In the pipe system below, water flows through the pipe from left to right. In section $1,$ a pressure measurement device was installed. In section $2,$ the water is released into the atmosphere. The pressure reading in section $1$ was $180$ kPa $.$ If the mass water flux in the pipe is $15k\frac{g}{s},$ what is the head loss between sections $1$ and $2$ in m $?$