A big thanks AndrewF ..
http://www.youtube.com/watch?v=nJwprhkwYdQ
Indeed as we have energy in excess, it can use it for pumping water on big height. Thanks tems Sytstem the waves of the sea may be even lower pressure designed .. Well, for example, only 2 bars .. which then drives the ram pump to a height of 125 meters, it can pump water
http://practicalaction.org/media/preview/10504
Andrew