How to Properly Maintain and Clean an Espresso Coffee Machine Espresso machines push water through the coffee grounds via pressure. This type of brewing results in stronger beverages than drip coffee. The machines require 9 bars of pressure to extract flavor from the coffee grounds. There are three main kinds https://coffeee85867.theisblog.com/29981378/how-coffee-machines-espresso-has-changed-my-life-the-better