All of us know that we need a pump to take water from a lower level to a higher level.
Most of these pumps use electricity. In many places, there is no electricity, or there is a very unreliable power supply. Water has to be drawn from wells or ponds.
Even in towns, water has to be stored in underground tanks and then pumped up. We have designed a method where the manual power in the simple act of cycling is used to operate a water pump. The rotary motion of the pump is not by electricity but by manual power.