How to Properly Maintain and Clean an Espresso Coffee Machine Espresso machines push water through the coffee grounds using 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 grounds. There are three primary kinds https://coffeeeuk69684.blogs100.com/30236719/7-things-you-ve-never-knew-about-coffee-machines-espresso