How to Properly Maintain and Clean an Espresso Coffee Machine Espresso machines push water through the coffee grounds with pressure. This type of brewing produces a stronger drink than drip coffee. The machines require nine bars of pressure to extract the flavor from the ground. There are three main types https://wwwcoffeeeuk36618.prublogger.com/29272928/10-fundamentals-on-espresso-machine-you-didn-t-learn-in-school