How to Properly Maintain and Clean an Espresso Coffee Machine Espresso machines use pressure to force water through coffee grounds. This type of brewing makes more flavor than drip coffee. The machines require nine bars of pressure in order to extract the flavor from the ground. Espresso machines are available https://coffeeeuk96832.blogspothub.com/29254528/what-you-should-be-focusing-on-improving-espresso-machine