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What to Do After a Water Main Break

Flush Your System 

WSSC asks customers who have experienced a water service disruption due to a water main break to take a few precautions.

Steps to Take 

WSSC recommends you flush the cold water lines you use in your home or business.  We recommend you flush your taps as a precaution because of an increase in the number of water main breaks in our aging infrastructure.  It will cost you just pennies per faucet to take this important step.

We suggest running all cold water taps for five minutes.  If you have a single-lever faucet, set it to run the cold water.  Begin with the highest faucet in your home or business and then open the other faucets one at a time, moving from your highest floor to your lowest. 


WSSC Flushing Guidelines:
What to do after a Water Main Break in your area

After five minutes, turn off your faucets in reverse order, from lowest to highest.  You should also flush your refrigerator’s water lines. 

Flushing your water lines lowers the risk of potential contamination that is created whenever a water main is depressurized because of a break.  This is particularly important for people who have special health concerns because their immunity is compromised. 

If you still experience problems after performing the above procedures, or if you have any questions, please contact our Customer Emergency Call Center 24 hours a day, seven days a week at: (301) 206-4002, 1-800-828-6439 or TTY (301)-206-8345.


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