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[[Image:ram_hydrolic_pump.jpg|right|80px]]
[[Image:PrincipleHydraulicRam.jpg|thumb|right|200px|Principle of a Hydraulic Ram pump.]]
[[Image:HydraulicRamChildren.jpg|thumb|right|200px|Children standing around a hydraulic ram pump. Photo: [httphttps://www.ashden.org/mediawinners/international_photos/2007 aid-foundation-aidfi AID Foundation, Phillippines.]]]
A hydraulic ram pump is a water pump powered by water with a height difference. In areas where natural flows exist with a height difference of the water over a small distance, hydraulic ram pumps can be used to transport water to higher grounds without using electricity or fuel. The hydraulic ram uses the water hammer effect to develop pressure that allows a portion of the input water that powers the pump to be lifted to a point higher than where the water originally started. Apart from the kinetic energy of the water, no other source of power is needed.