Coffee and Espresso Machines Espresso machines utilize pressure in order to push water into finely roasted and tamped beans. They create a rich and delicious brew. Good Housekeeping Institute experts recommend models that brew at a minimum of 9 bars for a perfect extraction. Beware of brands that advertise more https://www.coffeee.uk/products/gaggia-manual-espresso-cappuccino-machine-with-magnet-valve