How to Properly Maintain and Clean an Espresso Coffee Machine Espresso machines make use of pressure to push water through coffee grounds. This method of brewing creates a stronger drink than drip coffee. These machines need 9 bars of pressure to extract flavor from the grounds. Espresso machines are available https://www.coffeee.uk/products/de-longhi-barista-pump-espresso-machine-coffee-cappuccino-maker-black