See Caffe Mocha.

sits directly underneath the brew group and catches spillage from the brewing process. On machines equipped with a 3 way solenoid valve the drip tray is also used as the drainage area for the expulsio [..]

in coffee and espresso terminology, this refers to a bed of coffee that has not been exposed to enough passing water. The resulting brew is often weak and thin bodied.

I cannot stress enough the importance of a good grinder to the overall quality of your espresso production in the home.

See Pressure Release System.

can refer to a class of espresso machines that require you to grind, dose and tamp your coffee into a portafilter, but the machine brews for a predetermined volume and provides the required pressure a [..]

Pressure rating used on most pump driven espresso machines. 9 BAR, the typical accepted pressure for brewing espresso is 8.8 atmospheres of pressure or 130 pounds per square inch. Almost every consume [..]

is the Italian term for the person who operates the espresso brewing equipment at a cafè or coffee house. When you become proficient at brewing your own espresso drinks, you might regard yourself as a [..]

the main heating unit for water in an espresso machine. Made of brass, stainless steel, copper or aluminum, the boiler is one of the most important components of the machine.

the area of the machine that contains the grouphead and portafilter and filter baskets. Some brew groups (see E61) are actively heated, some are passively heated by the boiler through metal on metal c [..]