EXAMPLE $4\mathrm{.}15$

Elevation level for point $1$ and $2$ is $24m$ and $30m$ respectively.

Determine the required air pressure $($in the tank$)$ is needed to

flow $0\mathrm{.}013\frac{m^3}{s}$ of water to point $2.$ Consider all head losses.

Given: Length $=152m,$ diameter of pipe $=150mm,f=0\mathrm{.}0588,k_e$

$=0\mathrm{.}5$