Description: Head observed at inlet area of the installation, corresponding to the sum of the height, pressure head and velocity head  ; Name: Total head at inlet area of the installation
Description: Determined total head at the inlet area of the installation, which corresponds to the sum of geodetic head, pressure head and velocity head; Name: Total head at inlet area of the installation
Description: Minimum NPSH available at the inlet area of the pump as determined by the conditions of the installation for a specified rate of flow ; Name: Net positive suction head available