This means that all of the water will pass through the coffee bed and none will escape around it. This is a positive factor because it will inevitably lead to a richer and more consistent cup of coffee as all of the water comes into contact with the coffee bed.
THE TYPE OF COFFEE USED MAKES A BIG IMPACT ON BREW TIMES
Because water cannot escape around the coffee bed (like in other devices), you will notice that the type of coffee (process, origin, roast) will really make a big impact on drawdown times compared to "traditional" brewing devices. In traditional devices, when coffee would provide resistance, water often takes the path of least resistance, going around the bed rather than through it. This can make devices look "consistent" by giving you consistent brewing times between coffees, but often this is a sign of inconsistency as extraction and cup would lower at the same time. Different coffees will extract differently. Washed, dense coffees will drain slower in a zero bypass environment because they provide more resistance to the water passing through. Our recipes provide brewing ranges, but please note that some coffees are just denser, slower, or roasted in ways that will make them less soluble and slower draining. Adjust your grind size (or patience) to taste!