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 produces more flavor than drip coffee. These machines require nine bars of pressure 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