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

Map: The new trail route south of the work zone is a shared path for pedestrians, bicyclists, and motorists visiting the Washington Canoe Club.

The new trail route south of the work zone is a shared path for pedestrians, bicyclists, and motorists visiting the Washington Canoe Club.

CONSTRUCTION ACTIVITY NOTIFICATION - DC CLEAN RIVERS - POTOMAC ...

Phase 1 repair photo of tunnel and worker inside after completion

Following a nearly year-long construction effort, DC Water has completed repairs on a nine foot diameter, 140-year old sewer tunnel on 22nd Street Northwest. Construction was done in two phases, with ...

Graphic of Boil Water Advisory Lifted Notice with neighborhoods listed


**Advisory is Lifted as of 9:00 p.m., June 13, 2025** 

All DC Water customers in the impact area under the precautionary boil water advisory can use tap water for all purposes after following the ...

Upcoming Meeting

Board of Directors Meeting

April 24, 2023

Monday 9:00 AM

Announcement

Map: The new trail route south of the work zone is a shared path for pedestrians, bicyclists, and motorists visiting the Washington Canoe Club.
New Section of Capital Crescent Trail Opens, Potomac River Tunnel Construction moves to next phase

The new trail route south of the work zone is a shared path for pedestrians, bicyclists, and motorists visiting the Washington Canoe Club.

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
Date
June 18, 2025
Wednesday, 9:30 AM