Rope pump.
https://www.emergency-wash.org/water/en/technologies/technology/rope-pump
👉🏼 PDF: https://app.box.com/s/ogwhf2oomdy1xxrz6es31zyxz55ut4rk _ A Rope Pump (also known as a rope and washer pump) is a positive displacement pump that displaces a fixed amount of water per cycle. Water is lifted directly using the continuous movement of a flywheel moving in one direction (rather than in a reciprocating manner). Components below ground are mostly made from plastic, making them corrosion resistant and easier to maintain. These pumps are usually not suited to the acute response phase, and are more for long-term water supply in rural areas, where they are good for upgrading open wells and disused boreholes to improve access and water quality.