How to Properly Maintain and Clean an Espresso Coffee Machine Espresso machines use pressure to force water through coffee grounds. This type of brewing results in an even stronger drink than drip coffee. These machines require nine bars of pressure in order to extract the flavor from the ground. There https://coffeee-uk50702.full-design.com/from-around-the-web-twenty-amazing-infographics-about-espresso-machine-72439395