Coffee And Espresso Machines Espresso machines make use of pressure to push water through finely ground and tamped coffee beans. They produce a rich and tasty brew. Good Housekeeping Institute experts recommend models that brew at 9 bars or less to ensure a perfect extraction. Beware of companies that claim https://www.coffeee.uk/products/salter-ek4369-caffe-barista-pro-espressokocher-15-bar