Leviathan's COO Gadi Hareli sits next to an in-pipe hydroelectric turbine during an interview with Reuters in Neve Shalom, near Jerusalem October 22, 2009. Outside a small town near Tel Aviv, a pilotless drone aircraft with a three-foot (1-metre) wingspan collects data from hundreds of gauges. A single technician with a laptop monitors the flight from the ground and receives an instant picture of the town's system, including, he says, a house with a leaky toilet. A plane that reads water meters -- as well as a tiny turbine that can generate electricity from within water pipes -- are among technologies Israeli companies are developing to help save billions of dollars in water lost from leaky pipes. Picture taken October 22, 2009. Reuters Pictures logo Reuters Pictures 27 months ago

Leviathan's COO Gadi Hareli sits next to an in-pipe hydroelectric turbine during an interview with Reuters in Neve Shalom, near Jerusalem October 22, 2009. Outside a small town near Tel Aviv, a pilotless drone aircraft with a three-foot (1-metre) wingspan collects data from hundreds of gauges. A single technician with a laptop monitors the flight from the ground and receives an instant picture of the town's system, including, he says, a house with a leaky toilet. A plane that reads water meters -- as well as a tiny turbine that can generate electricity from within water pipes -- are among technologies Israeli companies are developing to help save billions of dollars in water lost from leaky pipes. Picture taken October 22, 2009.