The highest point in a lawn sprinkling system is 35` higher than the water supply main. A minimum pressure of 35 psi is required at the highest point in the system. Not allowing for friction loss,the pressure at the main must be:

The highest point in a lawn sprinkling system is 35` higher than the water supply main. A minimum pressure of 35 psi is required at the highest point in the system. Not allowing for friction loss,the pressure at the main must be: