How to Properly Maintain and Clean an Espresso Coffee Machine Espresso machines use pressure to push water through coffee grounds. This type of brewing produces a stronger drink than drip coffee. These machines require 9 bars of pressure to extract flavor from the grounds. There are three kinds of espresso https://wwwcoffeeeuk77709.tkzblog.com/29663048/15-terms-everybody-within-the-espresso-machine-industry-should-know