This type of espresso maker relies on direct human power to generate the pressure required for brewing. A lever attached to a piston is pulled down by the user, forcing hot water through a portafilter containing finely-ground coffee. This contrasts with pump-driven machines, where an electric pump provides the necessary pressure. The process offers the user a high degree of control over the extraction process.
The direct manipulation of pressure and flow rate allows for nuanced flavor profiles and experimentation with different brewing parameters. This hands-on approach provides a deeper connection to the craft of espresso making, often appealing to enthusiasts seeking a more traditional and tactile experience. Furthermore, the absence of a pump and other electronic components contributes to a simpler, often more durable machine. Historically, lever machines predate pump-driven models, representing an earlier stage in espresso technology that has experienced renewed interest in recent years.
