What Makes the Faema E61 Espresso Machine's Brew Head Special?

If you’ve been shopping for a ‘serious’ espresso machine lately, chances are you’ve seen the term ‘E61’ tossed around like a badge of honor. But what’s so special about this decades-old brew head that makes it still relevant today? Is it just vintage appeal, or does it actually improve your shots?

The E61 brew head, introduced in 1961 on the Faema E61 machine, is celebrated for two key features: its use of thermal siphon heating and a built-in pre-infusion system. These engineering details help maintain stable temperatures and improve espresso extraction — benefits that still matter in modern machines.

What Is the E61 Brew Head?

The E61 brew head is a mechanical espresso brewing assembly first launched in 1961 on the Faema E61 espresso machine. Designed with a sleek lever-operated mechanism, it became an instant classic and set the standard for professional espresso machines throughout the 20th century. Its distinctive look and reliable performance have kept it in production and retrofitted on modern machines for nearly 60 years.

How Does the E61’s Thermal Siphon System Work?

The E61 brew head uses a clever passive heating method called thermal siphoning. It connects to the boiler (or heat exchanger) through two water channels: an inlet at the top and a return at the bottom. Hot water enters chamber 1 from the boiler, heats the brew group, then cools slightly, becomes denser, and sinks back to the boiler via the return channel. This continuous flow occurs naturally due to temperature-driven density differences — no pumps or electronics required. The result is a brew group that stays evenly heated during operation.

Why Does the E61 Have a Pre-Infusion Feature?

The E61 includes a built-in pre-infusion function thanks to its expansion chamber (chamber 4) and a long, narrow water path. Instead of blasting hot water at full brewing pressure (8–10 bar) directly onto the coffee puck, the design slows the pressure ramp-up. Water travels through a series of small, winding channels that restrict flow, allowing pressure to build gradually. This gentle start helps extract more evenly and reduces the risk of channeling, leading to a better-balanced shot.

Why Is the E61 Still Popular Today?

Despite being over 60 years old, the E61 brew head remains a favorite among home and commercial baristas. Its thermal stability through passive heating and the smoother extraction from pre-infusion contribute to more consistent and flavorful espresso. Many modern machines still include a version of the E61 group head, either as a direct tribute or functional redesign, proving its lasting impact on espresso technology.

Frequently Asked Questions

What year was the E61 brew head introduced?

The E61 brew head was first introduced in 1961 on the Faema E61 espresso machine.

How does the E61 maintain brew group temperature?

The E61 uses a thermal siphon system with an inlet and outlet water channel. Hot water flows from the boiler into the brew group, cools slightly, becomes denser, and returns to the boiler, creating a natural convection loop that keeps the group head heated without additional energy input.

What is the pre-infusion effect in the E61?

The E61’s pre-infusion is achieved through an expansion chamber and a restricted water path. This slows the build-up of brew pressure to 8–10 bar, allowing a gradual increase that leads to more even extraction and less risk of channeling.

Why do modern espresso machines still use E61 designs?

Modern machines often include E61-style brew heads because of their proven thermal stability and pre-infusion benefits, which result in more consistent and higher-quality espresso extractions.

Does the E61 brew head require electricity to heat?

No, the E61’s thermal siphon system is passive and relies on heat from the boiler. No additional electrical heating elements are used in the brew group itself for temperature maintenance.

Recommended FrontStreet Blends for E61 Machines

For E61-equipped machines, FrontStreet Coffee’s Classic Blend delivers rich crema and a balanced body, making it ideal for traditional espresso drinks like lattes and cappuccinos. Its smooth, approachable profile works well even for beginners. For a bolder option, the Black Cocoa Blend offers deep flavors with solid crema at an affordable price—great for high-volume settings. Both blends are optimized for the steady pressure and temperature stability that E61 machines provide. Freshly roasted within 5 days · Orders placed before 17:00 ship the same day · Next-day delivery across most of Guangdong Province.