What to Do When Water Service Is Restored?

When water service is restored after an outage, do not simply turn everything back on and resume normal use. The correct first steps are to flush your pipes, check for leaks, verify water quality, and inspect for any damage that may have occurred while service was interrupted. Taking a few methodical steps before normal use protects your plumbing, your appliances, and your household.

Why Restoration of Water Service Requires a Few Steps First

When water pressure is lost and then restored, air can enter the pipes. Sediment and debris that settled during the outage can be pushed through the system when flow resumes. In some situations, especially after a main break or extended outage, the water utility may issue a boil water advisory, meaning the water is not safe to drink or cook with until further notice.

Skipping the flushing and inspection process can introduce sediment into appliances, clog aerators and filters, and in some cases expose household members to water that has not yet been confirmed safe.

Step 1: Check for Any Active Leaks Before Turning Anything On

Before restoring full water use throughout the home, do a quick walkthrough to confirm that all faucets, supply valves, and fixtures are in the off position. During an outage, pipes can develop stress cracks or fitting failures, particularly if the outage involved a freeze event or a sudden pressure fluctuation.

Check under sinks, around the base of toilets, near the water heater, and at any visible supply lines. If you see water, moisture, or hear the sound of running water with everything turned off, do not restore full service. Locate the main shutoff and call a plumber before proceeding.

Step 2: Flush Cold Water Lines First

Start at the faucet closest to where the main water line enters the home and work outward from there.

• Open each cold water faucet fully and let it run for 2 to 3 minutes

• Work through the home systematically, including bathrooms, the kitchen, and any utility sinks

• Allow outdoor hose bibs to flush as well if accessible

• Run water until it flows clear, steady, and without sputtering

The sputtering and irregular flow at the start is air being expelled from the lines. This is normal and will resolve as water pushes through the system.

Step 3: Flush Hot Water Lines and the Water Heater

Hot water lines should be flushed separately after cold lines are clear. Run each hot water faucet for 2 to 3 minutes to clear the distribution lines.

If the outage was extended, the water heater itself may need attention. Sediment disturbed during the outage can settle in the tank. Flushing the water heater by connecting a garden hose to the drain valve and running a partial drain cycle removes accumulated sediment and improves heater performance. If you are not familiar with this process, a plumber can handle it quickly.

For tankless water heaters, flushing the cold supply line feeding the unit is generally sufficient. Follow the manufacturer's guidance for any additional steps.

Step 4: Check and Clean Aerators and Filters

After flushing, sediment can collect in aerators, the small mesh screens inside faucet spouts, and in any inline filters throughout the home. These are easy to miss but important to address.

• Unscrew aerators from kitchen and bathroom faucets and rinse them under clean water

• Check the refrigerator water filter and ice maker line if your unit connects to the water supply

• Check under-sink water filtration systems and replace cartridges if they appear cloudy or clogged

• Check the washing machine inlet screens if the machine connects directly to supply lines

Clogged aerators reduce flow and can harbor sediment. Cleaning them takes minutes and prevents the slow pressure loss that often follows a major outage.

Step 5: Confirm Whether a Boil Water Advisory Is in Effect

If the outage was caused by a main break, infrastructure failure, or contamination event, your water utility may have issued a boil water advisory. Do not assume the water is safe to drink simply because pressure has been restored. Service restoration and water safety are not the same thing.

Check your local utility's website, call their customer service line, or monitor local news to confirm advisory status. Until an advisory is officially lifted:

• Do not drink tap water without boiling it first

• Do not use tap water to prepare food, make ice, or brush teeth

• Do not give tap water to pets

• Use bottled water or properly boiled and cooled water for all consumption needs

A boil water advisory is typically lifted once the utility has completed testing and confirmed the water meets safety standards. That process can take 24 to 48 hours or longer after service is restored.

Step 6: Reconnect and Restart Appliances Carefully

Once water is flowing clearly and no advisory is in effect, appliances can be reconnected and restarted. Do this in a controlled sequence rather than all at once.

Dishwasher: Run an empty cycle first to flush the water lines feeding the unit and clear any air or sediment before running a load of dishes.

Washing machine: Run a short rinse cycle without laundry to flush the inlet hoses before washing clothes.

Ice maker: Discard the first two or three batches of ice produced after service is restored. This clears any residual sediment or off-taste from the supply line.

Water filtration systems: Follow the manufacturer's instructions for flushing the system after an outage. Most under-sink and countertop systems require several gallons of water to be run through before the filter is operating normally.

Step 7: Inspect for Water Damage That May Have Occurred During the Outage

Depending on the cause of the outage, there may be water damage in or around the home that requires attention. A main break can cause ground saturation near the foundation. A freeze event that caused the outage may have also caused a pipe to fail inside the wall.

After service is restored, look for:

• Water stains or new moisture on ceilings, walls, or floors

• Soft or discolored drywall near plumbing runs

• Water pooling in the basement or crawl space

• Unusual odors that could indicate water behind finished surfaces

If anything looks or smells wrong, have a professional assess the situation before assuming the home is unaffected. Water damage discovered early is significantly less costly to address than damage found weeks later after mold has developed.

FAQ

How long should I run the faucets to flush the lines after service is restored? Two to three minutes per faucet is generally sufficient for residential supply lines. If the outage was extended or involved a major main break, some utilities recommend running water longer, up to five minutes per fixture. Your local utility may issue specific guidance after a significant event. When in doubt, run until the water flows clear, steady, and without any discoloration or odor.

My water looks cloudy or has a slight odor after service was restored. Is that normal? Cloudiness immediately after restoration is often caused by air bubbles and typically clears within a minute of running the tap. A persistent milky appearance that does not clear, a chlorine smell stronger than usual, or any other unusual odor or color warrants caution. Contact your water utility to report the issue and confirm whether it is expected or requires a service call. Do not drink water with a persistent odor or discoloration until the cause is confirmed to be harmless.

Should I call a plumber after a major water outage even if everything seems fine? Not necessarily for a routine short-term outage. For extended outages caused by a main break, a freeze event, or significant pressure fluctuations, a brief plumbing inspection is a reasonable precaution, particularly in older homes with aging supply lines or fittings. A plumber can check supply line connections, inspect the water heater, and confirm that no fittings were stressed during the pressure change. The cost of an inspection is minor compared to discovering a slow leak inside a wall weeks later.