Definitions for "Head Pressure"
Pressure due to elevation of water. Equals 0.433 pounds per square inch (PSI) per foot of elevation. Back pressure. (Approximately 0.5 PSI is required to lift water 1 foot in elevation)
the pressure above gravity at the head of the column. Expressed in psig, bar, atm, or MPa.
Expression of a pressure in terms of the height of fluid. P = ypg, where p is fluid density and y is the fluid column height.