How to Properly Maintain and Clean an Espresso Coffee Machine Espresso machines push water through the coffee grounds via pressure. This method of brewing creates a stronger drink than drip coffee. These machines require nine bar of pressure to extract the flavor from the ground. Espresso machines are available in https://www-coffeee-uk15317.anchor-blog.com/10063912/5-laws-to-help-in-the-espresso-machine-industry