How to Properly Maintain and Clean an Espresso Coffee Machine Espresso machines push water through the coffee grounds via pressure. This type of brewing results in a stronger beverage than drip coffee. The machines require nine bars of pressure to extract the flavor from the ground. Espresso machines are available https://www.coffeee.uk/products/de-longhi-nespresso-gran-lattissima-en650-b-1400-w-black