NEW invention called the “Solar Evacuated Thermal Vacuum Water Pump” or (SETVP’s), works by harnessing the energy of the sun in the day time and then uses the cold of night to create a vacuum in the system that is used to pump water. A link to the second video showing the addition of two one way valves to make it pump water in the day time under pressure is at the end of the video!!! This is a working prototype of an idea on how to pump water from stagnant water sources cheaply using no moving part. I see only a few limitations on overall potential lift height.
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