NYC winters can be brutal on water mains. When temperatures drop below freezing, water inside pipes can freeze and expand, causing cracks and bursts. Shallow water mains are most vulnerable. Protection tips include insulating exposed pipes, keeping a slight drip running during extreme cold, knowing the location of your main shutoff valve, and monitoring for signs of freezing such as reduced water pressure or frost on pipes. If your water main is old or shallow, consider replacement before winter. Sewer & Water Pros installs water mains at proper depth to prevent freezing issues.