Purifying water used in espresso machines involves removing impurities like chlorine, minerals, and sediment. This process ensures the water used for brewing is of optimal quality. For instance, a common method involves using a filter cartridge fitted to the machine’s water reservoir.
Clean water is crucial for optimal espresso extraction and flavor. Minerals and other impurities can negatively impact the taste of the coffee, leading to bitterness or undesirable flavors. Furthermore, scale buildup from hard water can damage internal components, reducing machine lifespan and requiring costly repairs. Historically, baristas have employed various methods to improve water quality, recognizing its fundamental role in producing excellent espresso.