For a smooth, mellow brew, this beautifully designed coffeemaker uses the classic cold-drip method to produce full-flavored coffee concentrate ideal for making iced beverages and for use in recipes. Use right away or store the concentrate in the fridge, so when you're ready for a steaming cup of coffee, just mix with hot water. The classic brewing system brings out coffee's flavor and aroma by slowly dripping cold water through finely ground beans. Brewing your coffee with cold water preserves delicate flavor and eliminates bitter oils and acids that would be extracted at higher temperatures. A metal valve controls the drip to ensure perfect drop-by-drop percolation.
Shut the valve at the top chamber with ice cold water or ice cubes. Add little bit of cold water on the grounds, wet the paper filter place it over the coffee. This allows to disperse the water thoroughly so the coffee is extracted at a consistent rate. You should adjust the valve for approximately 1 drop per second. Once the extraction process begins, it is important to keep checking the Hario water dripper because the water level will decrease, causing the flow-rate to decline.