How to Properly Maintain and Clean an Espresso Coffee Machine Espresso machines force water through the coffee grounds with pressure. This type of brewing makes stronger beverages than drip coffee. The machines require nine bars of pressure in order to extract the flavor from the ground. Espresso machines are available https://www.coffeee.uk/products/de-longhi-specialista-prestigio-espresso-cappuccino-machine-black-ec9355-bm