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The piston, or lever, driven machine was developed in Italy in 1945 by Achille Gaggia, founder of espresso machine manufacturer Gaggia. The design generically uses a lever, pumped by the operator, to pressurize hot water and send it through the coffee grinds.
How to make espresso. 1  Fill your espresso machine's reservoir or hook it up to your water line. However your water is fetched, make sure it's cold, filtered, and not-too-hard-or-soft. 2  Turn on your machine and give it plenty of time to heat up. Depending on the size of your machine, this could take anywhere from 15 to 45 minutes.