Shut the main water valve first, usually in the basement or crawlspace where the service enters, and open a low faucet to drain what is left in the lines. A burst pipe is repaired by removing the damaged section, joining in new pipe and testing the system under pressure. Call the number on this page to be connected with a local plumber in Washington, DC.

First steps while water is running
- Close the main. In most District homes the main shutoff is in the basement or cellar near the front wall, where the service pipe comes through the foundation. In a condo it may be in a utility closet or near the water heater.
- Stay away from wet outlets. Switch off power at the panel only if you can reach it from a dry spot.
- Look after the water heater. Turn an electric unit off at its breaker, or set a gas unit to pilot, if the hot side has lost water.
- Drain the system. Open the lowest faucet or a basement laundry tap.
- Document it. Photograph the break and every wet area for insurance.
Why pipes burst here
DC winters bring cold snaps with nights well below freezing. Pipe in exterior rowhouse walls, unheated basements, crawlspaces, enclosed porches and outdoor spigots is the most exposed. Water freezes, expands and splits the pipe, and the leak often shows only when the ice thaws. Old galvanized steel, common in homes from the 1950s and earlier, can also fail from corrosion with no freeze at all.
When the problem is outside
Water bubbling up in the sidewalk, the street or the tree box can mean a DC Water main or the public-space part of a service pipe. Report it to the DC Water 24-Hour Command Center at 202-612-3400. Pipe on the private-property side is the owner's responsibility.
What the repair involves
A plumber opens enough wall or ceiling to reach sound pipe on both sides of the break, cuts out the damaged length and installs new copper or PEX with proper fittings. The line is then pressurized and checked before walls are closed. If the pipe froze, the plumber should also look at nearby runs that took the same cold, since one split often has company. Insulating exposed pipe or moving a line to a warmer wall can prevent a repeat.
What affects the bill
Access matters most: a break in an open basement ceiling is quicker than one inside a finished plaster wall. Pipe material, the number of damaged spots and after-hours timing also play a part. Drying, mold prevention and wall repair are usually separate trades.
Burst Pipe Repair questions from Washington homeowners
Where is the main water shutoff in a DC rowhouse?
Who fixes a break under the sidewalk?
Can I use the water after shutting off one section?
How can I avoid frozen pipes next winter?
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Sources
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