a device in which the cross-sectional area of the piston rod is more than one-half the cross-sectional area of the moving component

The plunger or piston moved by waterpower in a mechanical system.

a water pump that uses the kinetic energy of flowing water to force a small fraction of that water to a reservoir at a higher level

a pump which can be used only in a sloped terrain, because it needs a sufficient fall of water to feed the ram

a self-powered device which pumps water using only water The New York Power Authority (nypa) decided to conduct a mechanical cleaning of Sensitive areas including pump housings, standpipes, sensor piping and Including Pumps Powered