Manual / Lever
The main characteristic of the lever coffee machines is its classic and beautiful design. These type of machines are piston-driven, which means that the operator, using a lever pumps to pressurize hot water and send it through the coffee grinds.
These machines allow the operator to be an important part of the process of pulling a shot, that is the act of producing a shot of espresso. The barista can control the length of pre-infusion, flow rate, and pressure by when they bring down the lever.
Although using a lever machine may seem complicated, it is actually really easy once the operator gets used to them. It might take you time to figure out how to obtain the perfect espresso shot for you, but experimenting with a lever machine is totally worth it.