Written by Jerry Ratzlaff on . Posted in Fluid Dynamics

 $$\large{ H = h_d - h_s }$$

### Where:

 Units English SI $$\large{ H }$$ = system head $$\large{ft}$$ $$\large{m}$$ $$\large{ h_d }$$ = total discharge head $$\large{ft}$$ $$\large{m}$$ $$\large{ h_s }$$ = total suction head $$\large{ft}$$ $$\large{m}$$