This is a link to a ...

This is a link to a discussion that Petro Alamanso started. In his link, they make known that energy savings of 50% are realized by using a pressure head. The second link is to the article. With what I have suggested, the pressure head's potential could be used in different ways. One way would be to operate a mechanical pump that has a positive displacement. In an impoverished area, it could be helpful. And with a pipe diameter of about 85 cm's, that would be about 1400 kg of force. With a diameter of about 1.7 meters, about 5,600 kg's of force. And with 2 units, one could possibly develop hydroelectric power while other desalinates or purifies water with the RO process. https://water.tallyfox.com/discussions/gravity-driven-treatment-mine-water-slashes-energy-use#comment-form http://sourceable.net/gravity-driven-treatment-mine-water-slashes-energy-use/ I found an online pressure head to watt calculator and if 25% of a 10 meter tall pressure head could flow at about 1.2 meters per second, it might be able to generate about 25 kilowatts of electricity. Myself, I am in a bit of disbelief over this but then 25 kw's translates to about 25 hair dryers or microwave ovens. Still, even that amount of power could be used for an evaporator type water purifier, that is if the location does not have sufficient solar power.