Water jet may refer to:
* A
jet of water under pressure, like in an ornamental fountain
*
Pump-jet
A pump-jet, hydrojet, or water jet is a marine system that produces a jet of water for propulsion. The mechanical arrangement may be a ducted propeller (axial-flow pump), a centrifugal pump, or a mixed flow pump which is a combination of both ...
, a marine propulsion mechanism for jetskis and other types of boats
*
Water jet cutter, a tool for cutting and the machining of engineering materials
*
Water jet (recreation), a personal-use water cannon that can be turned to spray in different directions and is usually found in water parks
*
Water-jet printer, a printer that makes use of water instead of ink
* Dental water jet, see
Oral irrigator
An oral irrigator (also called a dental water jet, water flosser or, by the brand name of the best-known such device, Waterpik) is a home dental care device which uses a stream of high-pressure pulsating water intended to remove dental plaque a ...
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