How to Properly Maintain and Clean an Espresso Coffee Machine Espresso machines force water through the coffee grounds via pressure. This type of brewing results in stronger beverages than drip coffee. These machines require nine bar of pressure to extract the flavor from the ground. Espresso machines are available in https://www-coffeee-uk02119.pointblog.net/10-factors-to-know-about-espresso-machine-you-didn-t-learn-in-the-classroom-71404729