The Hydraulic Ram: Pumping Water Uphill

The hydraulic ram made pumping water easy and inexpensive.

Hydraulic-Ram-3
3. Moving water rushes through the delivery valve into the air chamber (D) and compresses the air that is trapped inside. When the water pressure in the pump body drops below that of the air chamber, the delivery valve (C) closes, trapping the water and compressed air inside the air chamber.
Illustration By Sam Moore