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