In the water sector, as elsewhere, good ideas can be surprisingly old. One such old idea is the rope pump, which is over 2000 years old and was used in ancient China. A rope pump consists of a pipe that reaches down to the water, a rope or chain through the tube, washers attached to the rope that fit snugly inside the tube, and a wheel on top to draw the rope with washers through the pipe. The water is held between the washers in the pipe, and is pulled to the surface.