How to Properly Maintain and Clean an Espresso Coffee Machine Espresso machines make use of pressure to force water through coffee grounds. This type of brewing results in more flavor than drip coffee. These machines require nine bar of pressure in order to extract the flavor from the ground. Espresso https://wwwcoffeeeuk39989.blogocial.com/espresso-machine-explained-in-fewer-than-140-characters-65776781