Preparing Pipes for Winter Weather

November 07, 2008

As cold weather approaches, there are steps you may take to help prevent frozen pipes in your home. Water expands as it freezes, so water that is sitting in a pipe will place tremendous pressure on the pipe as it freezes. This pressure can cause the pipe to break.

Pipes that freeze most frequently are those that are exposed to the outside, such as outdoor hose outlets, water sprinkler lines and pool supply lines. Also at risk are pipes in unheated interior areas such as kitchen cabinets, attics, garages, basements and crawl spaces.

Before the onset of cold weather, help prevent frozen pipes by following these recommendations:
• Remove, drain, and store garden hoses.
• Close the inside valves that control the water supply to outside hose attachments, (known as bibs).
• Open the outside hose bibs to allow any water in the line to drain out. Keep this outside valve open so that any water remaining in the pipe can expand without causing the pipe to break.
• You may want to install a “pipe sleeve” for water pipes that are not insulated. Building supply stores carry these and other supplies for insulating pipes.
• If you go away for an extended time during cold weather, leave the temperature set above 55 degrees before you leave.
• In severe cold weather, let cold water drip from faucets served by exposed pipes. The cold water is still above freezing and will help prevent the pipe from freezing.

Latest News

Map of Water Street and Capital Crescent Trail

DC CLEAN RIVERS – POTOMAC RIVER TUNNEL PROJECT

Beginning on or about November 12, 2025, DC Water will begin preparing for construction on the Potomac River Tunnel on the 3300 block of Water Street NW, beneath the Whitehurst Freeway.

picture of damage inside the RCMI

Construction Nov 7-10, 14-17; Additional Weekend Closures Will Also Be Necessary 

For the next two weekends, beginning Friday evening and continuing through early Monday, November 7-10 and 14-17, a section of the Rock Creek Multi-use Trail near Rose Park—between P Street NW and Pennsylvania Avenue NW— will be temporarily closed for construction. One sounthbound lane of Rock Creek and Potomac Parkway will also be closed, impacting traffic. This closure is part of ongoing high-priorty repairs to the Rock Creek Main Interceptor (RCMI), a major sewer line which transports more than 100 million gallons of wastewater each day.

Picture of DC Water staff, CEO/GM David Gadis, Mayor Muriel Bowser, DC Water Board Chair Dr. Unique N. Morris-Hughes

Today, DC Water celebrated a major milestone in the Potomac River Tunnel Project with the ceremonial blessing of Mary, the tunnel boring machine (TBM) that will dig the northern leg of the tunnel. The ...

Upcoming Meeting

Board of Directors Meeting

April 24, 2023

Monday 9:00 AM

Announcement

Map of Water Street and Capital Crescent Trail
TRAFFIC ADVISORY: Water Street NW at Georgetown Waterfront Park — Travel Lane and Sidewalk Closures

DC CLEAN RIVERS – POTOMAC RIVER TUNNEL PROJECT

Beginning on or about November 12, 2025, DC Water will begin preparing for construction on the Potomac River Tunnel on the 3300 block of Water Street NW, beneath the Whitehurst Freeway.

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
November 12, 2025
Wednesday, 9:30 AM

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.