Water Main Breaks: Causes, Damage, and What to Do

Water mains are large underground pipes that deliver water to your neighborhood. They break for many reasons, including aging pipe material, ground shifting, temperature changes, and construction work nearby. In many areas with wet winters and dry summers, the soil can expand and contract, putting stress on buried pipes.

Corrosion also weakens metal pipes over time. A sudden drop in water pressure or a visible flood in the street often signals a break. Sometimes the break is small and leaks slowly, while other times it bursts with force. You may notice puddles, sinkholes, or water running from a curb.

Your first move is to stop the water entering your home. Locate the main shutoff valve, usually near the water meter or where the pipe enters the house. Turn it clockwise to close it. Keep the valve location written down so you can find it quickly in an emergency.

Next, call your water utility to report the break. They can shut off the main supply at the street. Then, contact local water damage pros to assess the situation. They have pumps, dehumidifiers, and moisture meters to dry out your home and prevent secondary damage.

Once the immediate crisis is over, think about prevention. Install a water leak detector near your main valve and in basements or crawlspaces. These devices sound an alarm when they sense moisture, giving you a heads-up before water spreads. Also, know where your shutoff valve is and test it every few months.

Consider having a plumber inspect your home's pipes for corrosion or weak joints. If you live in an older home, the pipes may be more prone to failure. Keep an eye on your water bill for unexplained increases, which can indicate a slow leak. Regular maintenance can reduce the chance of a surprise flood.