DIY water Pumps

I have been facinated by hydrolic Ram Pumps for some time now. They use the force of water running down hill to pump some of that water up hill to a much higher elevation. You need about 3 ft of fall min to make one work and about 3 gpm flow. They use no electric and no out side power source. They are not very efficent, but they operate for free and pump 24/7 so you can build up a supply of water while you sleep. You get maybe 10% or less of the water flow pumped up the hill, depending on how high you need to pump it.
http://www.youtube.com/watch?v=hIFVGq3RFRE
This shows how it works.
http://www.youtube.com/watch?v=nU5AXw6f ... re=related
There are diagrams of how to make one from pvc plastic pipes on the net. It is a simple design that has been around since the 1700's. You can put a small inter tube in the water chamber partly inflated to avoid the unit from getting water logged when all of the air in the chamber gets desolved into the water flowing through. I think it is great tech, but I can't figure out a use of the water when I pump it up the hill here at my place. I have no live stock and have city water for drinking. It would be a strech to get the water to the top of the hill for irrigation here. But I love the idea and how it works.
http://www.youtube.com/watch?v=hIFVGq3RFRE
This shows how it works.
http://www.youtube.com/watch?v=nU5AXw6f ... re=related
There are diagrams of how to make one from pvc plastic pipes on the net. It is a simple design that has been around since the 1700's. You can put a small inter tube in the water chamber partly inflated to avoid the unit from getting water logged when all of the air in the chamber gets desolved into the water flowing through. I think it is great tech, but I can't figure out a use of the water when I pump it up the hill here at my place. I have no live stock and have city water for drinking. It would be a strech to get the water to the top of the hill for irrigation here. But I love the idea and how it works.