Missouri American Water Urges Customers to Prepare for Cold Weather

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Missouri American Water (NYSE:AWK) on Dec. 4, 2025 urged customers to prepare for freezing temperatures with practical steps to avoid frozen pipes and costly repairs.

Key actions include: locate and tag the main shut-off valve, test the valve, insulate exposed pipes, drain sprinkler systems, seal drafts near water lines, and allow a small trickle of water when below freezing. Additional tips cover thermostat settings for away periods, using freeze alarms, and safe thawing procedures. Customers with lead or galvanized service lines are encouraged to check replacement options.

Tips to Protect Pipes Before Freezing Temperatures

ST. LOUIS, Dec. 4, 2025 /PRNewswire/ -- As winter approaches, Missouri American Water reminds customers to prepare their homes and businesses, providing handy tips to help avoid costly repairs and unwanted stress from frozen water pipes this season.

"As temperatures drop, a little preparation goes a long way. Protecting your home's plumbing now helps ensure reliable water service all winter. Locate your main shut-off valve, insulate exposed pipes, and stay alert to prevent costly damage," said Jody Carlson, Vice President of Operations for Missouri American Water. "Taking these simple steps helps prevent frozen pipes, protect your home or business, and keep water flowing safely all season."

Prepare now:

• Locate your main water shut-off valve. In many homes, it is located near the water meter or close to where the water pipe enters the home. Hang an I.D. tag on the valve so it can be found quickly during an emergency. Download a tag to print by visiting https://amwater.com/corp/Customers-and-Communities/Wise-Water-Use/cold-weather-protection.
• Test your main water shut-off valve: Once located, test the shut-off valve by closing it. Once completely closed, check sinks and other water fixtures to ensure the shut-off valve is working properly.
  • Ball valves generally only require a quarter turn to close.
  • Gate valves are generally closed by turning the handle clockwise and should turn easily.
  • If the valve does not close easily, it may need to be serviced.
  • Bonus: While you are there, check your incoming water service line material! Missouri American Water is working with customers to identify their service line material. If they are found to be made of lead or galvanized steel, customers can schedule to have them replaced. Visit http://www.Missouriamwater.com/leadfacts for more information.
• Check sprinkler or irrigation systems: Make sure everything is turned off and fully drained.

Eliminate sources of cold air near water lines: Check for pipes in areas that might be prone to freezing, such as crawl spaces, unheated rooms, basements, garages, and exterior walls. Fix drafty windows, insulate walls around pipes and plug drafts around doors.

• Protect your pipes: Where pipes are exposed to cold, wrap them with insulation or heat tape (even fabric or newspaper can help).

When temperatures stay below freezing:

• Give pipes a helping hand: If pipes run through cabinets or vanities, open the doors to let warmer room temperatures flow in.
• Keep water moving through the pipes: Allow a small trickle of water to run. The cost of the extra water is typically lower than the cost of repairing a broken pipe.

When customers are away from home, consider the following:

• Set your thermostat at 55 degrees to prevent freezing.
• Have a friend, relative or neighbor regularly check the property to help ensure the heat is working and the pipes have not frozen.
• Consider purchasing a freeze alarm. The alarm will call a user-selected phone number if the inside temperature drops below 45 degrees.

If your pipes freeze:

• Shut off the water immediately: Don't attempt to thaw pipes without turning off the main water shut-off valve.
• Thaw a frozen pipe by warming the air around it: Do not leave space heaters unattended and avoid using kerosene heaters or open flames.
• Carefully turn the water back on: Once pipes are thawed, slowly turn the water back on and check pipes and joints for any cracks or leaks.

Find more cold weather protection tips, visit https://www.amwater.com/moaw/Water-Wastewater-Information/cold-weather-protection!

About American Water
American Water (NYSE: AWK) is the largest regulated water and wastewater utility company in the United States. With a history dating back to 1886, We Keep Life Flowing® by providing safe, clean, reliable and affordable drinking water and wastewater services to more than 14 million people with regulated operations in 14 states and on 18 military installations. American Water's 6,700 talented professionals leverage their significant expertise and the company's national size and scale to achieve excellent outcomes for the benefit of customers, employees, investors and other stakeholders.

For more information, visit amwater.com and join American Water on LinkedIn, Facebook, X and Instagram.

About Missouri American Water
Missouri American Water, a subsidiary of American Water, is the largest regulated water utility in the state, providing high-quality and reliable water and wastewater services to approximately 1.6 million people. For more, visit missouriamwater.com and follow Missouri American Water on X, Facebook, Instagram, YouTube and LinkedIn.

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SOURCE American Water

FAQ

What cold-weather actions did Missouri American Water (AWK) recommend on Dec. 4, 2025?

Locate and tag the main shut-off valve, test it, insulate exposed pipes, drain sprinklers, seal drafts, and let a small trickle run when below freezing.

How should AWK customers test their main water shut-off valve?

Close the valve fully and check sinks and fixtures for no flow; ball valves need a quarter turn, gate valves turn clockwise.

What should AWK customers do if they have lead or galvanized service lines?

Check service line material and schedule a replacement if found to be lead or galvanized by visiting the company's lead facts resource.

What temperature and precautions does AWK suggest when customers are away from home?

Set the thermostat to at least 55 degrees, have someone check the property regularly, or install a freeze alarm that triggers below 45 degrees.

What safe steps does AWK advise if pipes freeze?

Shut off the main water valve before thawing, warm the air around the pipe (avoid open flames), then slowly restore water and inspect for leaks.

Where can AWK customers find more cold-weather protection tips?

Visit the company's cold-weather protection pages at amwater.com/moaw or the cold-weather protection section on amwater.com for printable resources.