$7\mathrm{.}31$ Figure P$7\mathrm{.}31$ shows a portion of a fire protection system in which a pump draws $1500ga\frac{l}{m}in$ of water at $50F$ from a reservoir and delivers it to point B $.$ The energy loss between the reservoir and point A at the inlet to the pump is $0\mathrm{.}65lb-f\frac{t}{l}b.$ Specify the required depth $h$ to maintain at least $5\mathrm{.}0$ psig pressure at point $A.$

Fire protection system for Problems $7\mathrm{.}31$