A counter flow wort chiller has two connection points. One side is connected to the Grainfather, while the other is connected to the cold tap water. The hot wort is then pumped through copper inner coil while the cold water is pumped through the outer in the opposite direction, providing instant cooling and heat exchange. The cooled wort can then be pumped directly into your clean, sterile fermenter. This reduces the chance of contamination as nothing is inserted in the wort, and it is only passing through the wort chiller one single time, going straight to the sterile fermenter where the yeast is added. 23 L of wort can be cooled in as little as 20 minutes. The cooled wort temperature will be cooled to approximately 5 degrees above whatever your tap water temperature is.
Click here to view the video on using the Wort Chiller with your Grainfather.