How do Siphon or Vacuum Brewers utilize pressure dynamics to move hot water into the upper chamber for mixing with grounds?
Answer
Vapor pressure
Siphon or Vacuum Brewers employ a complex, visually engaging process driven by vapor pressure dynamics within their two-chambered glass systems. Heat is applied to the water source in the lower chamber. As this water heats, the formation of steam significantly increases the vapor pressure within that chamber. This heightened internal pressure physically forces the hot water upward, pushing it into the upper chamber where it mixes with the coffee grounds for the required steeping period. Once the heat source is removed, cooling causes a vacuum to form in the lower chamber, which then draws the finished brew back down through a filter.
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