How to Properly Maintain and Clean an Espresso Coffee Machine Espresso machines use pressure to push water through coffee grounds. This method of brewing produces an even stronger drink than drip coffee. These machines need 9 bars of pressure to extract flavor from the coffee grounds. Espresso machines are available https://wwwcoffeeeuk37791.blogproducer.com/36219337/coffee-machines-espresso-tips-that-will-transform-your-life