How to Properly Maintain and Clean an Espresso Coffee Machine Espresso machines force water through the coffee grounds via pressure. This type of brewing creates more strength than drip coffee. The machines require 9 bars of pressure to extract flavor from the grounds. There are three main kinds of espresso https://wwwcoffeeeuk49793.bloggip.com/29816842/7-simple-secrets-to-totally-moving-your-espresso-machine