The Hydraulic Ram: Pumping Water Uphill

The hydraulic ram made pumping water easy and inexpensive.

1. Water flows down the drive pipe (A) and escapes through the impulse valve (B). (This valve is variously called a waste valve, clack valve, escape valve, overflow valve or impulse valve.) As the water flows through the impulse valve, it builds enough pressure to suddenly close the valve.
Illustration By Sam Moore