So, how do you fix a black and copper tap that wont swivel? If you've just noticed that your faucet won't turn, it's most likely because the spout has been overtightened. This could damage the O-rings and prevent the spout from turning. It may also cause a leak or other problems, so it's important to clean it thoroughly. Hard water can cause your spout to break down and cause leaks, and scale buildup can also clog the swivel mechanism.