Manual Espresso Machines: 5 Fast Facts

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Fact #1. While we know now that regularly drinking espresso seems to reduce the risk of mortality, this isn't why people started drinking it. Legend has it that a shepherd discovered coffee after his goats became energized from eating the beans. He simply wanted their energy. Coffee cultivation started and thrived on the Arabian Peninsula. It wasn't long until people were looking for new ways to prepare the beans for consumption.
Fact #2. Manual espresso machines as we know them today didn't arrive until after World War II. These machines used steam pressure from the boiler to force water into a cylinder that would pressurize it even further. Pulling the spring-piston lever released the water into the puck at up to 10 bars of pressure.
Fact #3. Manual espresso machines typically only contain the basic components needed to make espresso. The water reservoir stores either cool or heated water before it comes into contact with the coffee grounds. Some machines have a heating element within the reservoir. Other machines rely on an outside heat source to boil water, such as a stove or campfire.
Fact #4. Some espresso machines contain a pressure gauge. Others require you to gauge the perfect pressure by feel. The learning curve of most machines lies here. Some create the ideal 9 bars of pressure quite easily. At 9 bars, it'll take you around 30 seconds to pull one shot of espresso. It takes more time to pull a shot using less pressure, and less time to pull a shot using more pressure.
Fact #5. Espresso is much healthier than it's given credit for. One serving of espresso is very low in calories, and is loaded with beneficial nutrients. It's also a good source of potassium, iron, and healthy fats. Of course, it's most known for its liberal caffeine content, which can help to improve attention.