One who or that which carries water; specifically, an arrangement of wires or the like on which a bucket of water, raised from a well, etc., may be conveyed wherever required, as to a house.(noun)
The Century Dictionary (Public Domain)
Use "water-carrier" in a sentence
"He worked as a night watchman, hawked potatoes on the street, pasted labels in a cannery warehouse, was utility man in a paper-box factory, and water-carrier for a street railway construction gang, and even joined the Dishwashers 'Union just before it fell to pieces."
"In Pyeng-yang I became a water-carrier, for know that that old city, whose walls were ancient even in the time of David, was considered by the people to be a canoe, and that, therefore, to sink a well inside the walls would be to scupper the city."
"Of course, she is I assume just speaking in her capacity as spokesperson and water-carrier for Obama."