One thing about water is that ...

One thing about water is that if it has 40 bars of pressure applied to it, it is also applying 40 bars of pressure to the sides of the pores. Yet under such pressure, water is slowed. Just look at how cold water is at the bottom of the sea. Placing water under vacuum could have the same effect but with a much lower expenditure of energy. I think Newton would say something like for every action their is an equal but opposite reaction. Force is one way, lack of force is the opposite way. And to create 1 bar of negative pressure by restricting the intake would seem to take less energy. And then to create 1/2 the force of what a system is using would take 1/2 of the amperage or Kwh of energy. Equal but opposing minus adhesion. Who knows, if not tried with the consideration that the force water exerts outward or on the sides of pores, pipes, etc. is not accounted for...