Scientists at the Commonwealth Scientific and Industrial Research
Organization (CSIRO, Clayton, Australia) have designed a showerhead
that saves 30% more water than conventional heads by adding air into
the water stream. The resulting shower feels just as "wet" as one with
a conventional head.

While the concept of using an aerated showerhead to save water is not
new, the technology behind the CSIRO device is: the aeration mechanism
is a small nozzle that fits inside a standard showerhead. The nozzle
uses a Venturi tube (a tube for which the diameter varies) creating a
difference in pressure and fluid speed. Air is sucked into the Venturi
tube as a result of the partial vacuum created, causing air and water
to mix, forming tiny bubbles within the water stream.

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