How to Properly Maintain and Clean an Espresso Coffee Machine Espresso machines push water through the coffee grounds via pressure. This type of brewing makes a stronger beverage than drip coffee. These machines require 9 bar of pressure to extract flavor from the coffee grounds. Espresso machines are available in https://coffeeeuk39639.thenerdsblog.com/35387873/12-facts-about-espresso-machine-to-make-you-look-smart-around-other-people