Winter can be a tough season for your pipes. This is due to the fact that water expands up to 10% more in volume when it freezes. So, if a pipe is full of water and the water inside of it freezes, the pipe can be subjected to pressure of about 3000psi, causing it to break or burst. The joints and valves can also break and overall, it can lead to costly repairs and replacements. Water supply pipes leading to outside faucets or hose bibs are especially vulnerable to this.