http://youtu.be/hLE9TrwLFZE
Rentricity Inc. is a renewable energy company that uses unique energy recovery configurations to transform the untapped energy in various man-made processes into electricity. The energy recovery systems – called Flow-to-Wires – convert excess pressure in water mains and other similar pipes into clean electric power.
The system uses highly pressurized water coming into substations to power turbines. The power is sold to electric utilities and provides extra income for water suppliers. Rentricity will help finance the equipment for a cut of the sales over its expected 30-40 year life span.