How do you clean calcium deposits out of cold water pipes?

To clean calcium and lime deposits from faucets you need some vinegar, a rag, and an old toothbrush. Soak a rag with vinegar and wrap it around the faucet. Let it sit for a few hours. Take an old toothbrush and dip it in vinegar. Gently scrub the deposits and wipe clean. To keep the deposits from coming back, you can spray them down with vinegar once a week, let it sit, then wipe them clean.