How to Properly Maintain and Clean an Espresso Coffee Machine Espresso machines push water through the coffee grounds by using pressure. This type of brewing creates stronger beverages than drip coffee. These machines require 9 bar of pressure to extract flavor from the coffee grounds. There are three main types https://coffeee-uk42782.azzablog.com/29903677/the-espresso-machine-success-story-you-ll-never-believe