Model of Al-Jazari's Double-Action Suction Pump

A fully operational large model of Al-Jazari’s double-action suction pump shown here at the '1001 Inventions' exhibition in the Jordan Museum.

By using copper pistons, effective seals and flapper valves, Al-Jazari made a pump that sucked up water from the river into two cylinders that then emptied their contents into a single shared outlet above the machine.