Flushing after Your Service Line has been Connected to the New Water Main
Now that your old water main has been replaced and your water service has been connected to the new water main, it is important to flush your plumbing of any sediment, rust or metals, including any lead to maintain water quality.
Sediment, rust and metals, including any lead may collect in the aerator screen located at the tip of your faucets. These screens should be removed prior to flushing.
(1) Please find the closest available tap (an outside hose spigot, laundry sink faucet or bathtub) to where the water comes into the home that is not used for drinking water. Fully open the cold water tap and let the water run for at least 5 minutes. Next flush any other cold water faucets on that floor for at least 5 minutes.
(3) Move to additional floors in sequence and flush any taps or faucets for at least 5 minutes.
If you have any questions or concerns about your water quality, or if you would like your water tested, please call us at 311. For additional advice and information visit http://www.epa.gov/il/advice-chicago-residents-about-lead-drinking-water .
If your water line has been idle or stagnant for more than 6-hours, it is advised that you flush for at least 5 minutes to maintain water quality. This may include flushing the toilet, taking a shower and doing laundry.