How to Properly Maintain and Clean an Espresso Coffee Machine Espresso machines force water through the coffee grounds with pressure. This type of brewing results in a stronger beverage than drip coffee. These machines require 9 bar of pressure to extract flavor from the coffee grounds. Espresso machines are available https://coffeeeuk07083.gynoblog.com/29291691/5-arguments-coffee-machines-espresso-is-actually-a-beneficial-thing