A bucket is typically a watertight, vertical cylinder or truncated cone or square, with an open top and a flat bottom, attached to a semicircular carrying handle called the bail.[from wikipedia]

Drain design and installation parameters are engineered to ensure drain functionality for its intended purpose, allowing for variances in volume, matter to be conveyed and maintenance requirements. Drain installation takes into account principles related to gravity, vacuum, grade, human exposure safety to biological agents and resistance to functional failure. also incorporated in drain design are requirements for drain maintenance and repair of a blocked drain.[from wikipedia]

A fountain (from the Latin "fons" (genitive "fontis"), a source or spring) is a piece of architecture which pours water into a basin or jets it into the air to supply drinking water and/or for a decorative or dramatic effect. [from wikipedia]

A watermill or water mill is a mill that uses hydropower. It is a structure that uses a water wheel or water turbine to drive a mechanical process such as milling (grinding), rolling, or hammering. Such processes are needed in the production of many material goods, including flour, lumber, paper, textiles, and many metal products. These watermills may be comprise gristmills, sawmills, paper mills, textile mills, hammermills, trip hammering mills, rolling mills, wire drawing mills.[from wikipedia]

Things relating to boats, docks, and marinas

When water is forced into the air so as to splash aback down.

Flush toilets and urinals in bathrooms found around the world.