mini pumpthat isa differentaltitudeandatmospheric pressureat thetemperatureabove 20degrees Celsiuswhen thesaturatedvapor pressure.However, mini pumpwhenthe water temperatureis 20degrees Celsius,saturatedvapor pressureis negligible.It should be noted, mini pumpinstallation siteelevationand water temperatureis different from thetestconditions, mini pumpsuch asthe localelevation of 300metersorpumpingthewater temperature exceeds20 degrees Celsius, thecalculated values??shouldbe amended.