The SUB Compact has a different sized cooling chamber than our prior SUB Home Tap. To insert the minikeg, tilt the bottom (without tube) into the back end of the machine. Then, slowly push down and level out the machine. To ensure you minikeg fits, please pre-chill the minikegs. If the chilled minikeg isn’t fitting, please carefully remove the black C-shaped clip at the top of the bottle. This will enable the bottle to fit in the chamber. Guide the tube up the gap in the front of the cooling chamber to ensure there are no kinks in the tubing.