How to Properly Maintain and Clean an Espresso Coffee Machine Espresso machines use pressure to push water through coffee grounds. This method of brewing creates more strength than drip coffee. These machines require nine bar of pressure to extract the flavor from the ground. There are three kinds of espresso https://wwwcoffeeeuk37791.blogproducer.com/36220124/from-the-web-the-20-most-amazing-infographics-about-espresso-machine