Coffee And Espresso Machines Espresso machines utilize pressure to force water into finely ground and tamped beans. They make a rich, delicious brew. Experts at the Good Housekeeping Institute recommend models that brew at the minimum pressure of 9 bars to ensure the highest extraction. Beware of brands that claim https://www.coffeee.uk/products/gaggia-ri8423-espresso-machine-freestanding-manual-white