Indoor Frozen Pipes – Tips for Homeowners

January 14, 2004

During periods of very cold weather such as the subfreezing temperatures we have all experienced in the past few days, many customers are confronted with frozen pipes that can be a serious inconvenience. At their worst, frozen pipes can result in severe damage to a homeowner’s or even a neighbor’s property.

The best source of information for property owners is a qualified plumber, but often many customers turn to WASA for advice. As usual, the best approach is prevention! For example:

- Wrap insulation around water pipes to prevent freezing, especially in those areas that are more exposed to the weather, like your garage.

- In areas of your property where pipes may be prone to freezing, consider allowing your faucet to run at a very slow drip to help avoid freezing.

- Try leaving cabinet doors under faucets open so they can get more heat.

If these preventive measures fail and your pipes freeze, there are some immediate steps to take that may help:

1. Immediately locate your main water service valve and be prepared to immediately shut the water off at the first sign of any water leakage (as outdoor temperatures rise, the ice inside the pipe will melt and leaks may then be evident). This valve is generally located inside your home close to where the line comes in from the meter. For instance, if your meter is in your front yard, the service line extends from the meter, into the yard and into the front part of your house. The valve could be in a closet on your main floor or in the basement. It generally will look like a 'wheel' on the valve. In some instances the service valve could have a lever handle. You should also avoid, if possible, leaving a building unattended if you suspect an internal pipe has frozen. Otherwise, you may return to find significant damage!

2. Turn on the closest faucet to the service valve (a trickle will do) to relieve pressure as the ice melts.

3. Use a blow dryer or space heater to thaw a frozen pipe. Place it 4-5 inches away from the pipe and let it blow until the pipe thaws. Be patient! This can be time consuming. DO NOT USE A BLOWTORCH OR OTHER OPEN FLAME because it’s too dangerous!

4. Once thawed, wrap insulation around water pipes, and follow the other preventive measures mentioned above to try to avoid re-freezing.

5. Immediately consult a plumber if you see or hear running water under a building or in a wall.

Latest News

Picture of frozen water pipes with icicles hanging off of them

With December getting off to a near-record cold start now is the time to act. Winter weather can bring risks like frozen pipes, water main breaks, and other emergencies that can disrupt your water service. Don’t wait for something to happen. DC Water encourages customers to prepare now and know what to do if the unexpected happens.

Worker on side of steep slope

TRAFFIC ADVISORY - CLEAN RIVERS - POTOMAC RIVER TUNNEL PROJECT

DC Water is in the final stretch of its slope stabilization project along Canal Road NW, a critical project that will pave the way for Potomac River Tunnel construction at this site. Beginning, the week of December 15, 2025, one westbound lane of Canal Road will be closed during daytime, off-peak hours on weekdays and Saturdays to hydroseed the slope.

Image of Wendy with EPA Letter

DC Water is reaching out to nearly 25,000 customers this month with important information about the material of their water service lines. These annual notifications are part of DC Water’s ongoing commitment to prevent exposure to lead and remove lead service lines from the District’s drinking water system through the Lead Free DC initiative.

Upcoming Meeting

Board of Directors Meeting

April 24, 2023

Monday 9:00 AM

Announcement

Worker on side of steep slope
Canal Road Slope Stabilization Project Nears End; Off-peak Lane Closure to Replant Slope

TRAFFIC ADVISORY - CLEAN RIVERS - POTOMAC RIVER TUNNEL PROJECT

DC Water is in the final stretch of its slope stabilization project along Canal Road NW, a critical project that will pave the way for Potomac River Tunnel construction at this site. Beginning, the week of December 15, 2025, one westbound lane of Canal Road will be closed during daytime, off-peak hours on weekdays and Saturdays to hydroseed the slope.

Latest Blog Post
A helicopter lowers a drill rig to workers on the Potomac River.
DC Water begins drilling in Potomac River to explore options to rehab underwater sewer line
When one of your major sewer lines runs through the Potomac River, a backhoe and trencher won't do. That's why we've got helicopters carrying a 14-ton drill and workers suspended midair over the Potomac.
Upcoming Meeting

Upcoming Events

Customer Service Center Announcement

Payment Plan Incentive: provides a credit back of 40% of the last 3 payments made and in the new fiscal year 50% will be credited. Eligible participants are residential customers who have had an outstanding balance for 60 days or greater and with an outstanding balance of $500 or more.