How to Properly Maintain and Clean an Espresso Coffee Machine Espresso machines use pressure to force water through coffee grounds. This type of brewing results in a stronger drink than drip coffee. These machines need 9 bars of pressure to extract flavor from the grounds. Espresso machines are available in https://coffeee-uk49188.bleepblogs.com/30281043/10-coffee-machines-espresso-tricks-all-experts-recommend