How to Properly Maintain and Clean an Espresso Coffee Machine Espresso machines use pressure to push water through coffee grounds. This type of brewing results in an even stronger drink than drip coffee. The machines require 9 bars of pressure to extract flavor from the coffee grounds. There are three https://www.coffeee.uk/products/de-longhi-ecp3630-espresso-cappuccino-machine-with-adjustable-frother