How to Properly Maintain and Clean an Espresso Coffee Machine Espresso machines push water through the coffee grounds with pressure. This type of brewing results in stronger beverages than drip coffee. These machines need 9 bars of pressure to extract flavor from the coffee grounds. Espresso machines are available in https://coffeee38978.blogsidea.com/36016587/15-terms-that-everyone-involved-in-espresso-machine-industry-should-know