Freezing temperatures and frozen pipes pose risks for homeowners
December 8, 2009
NEW — 2 p.m. Dec. 8, 2009
With weather forecasts predicting freezing temperatures, the American Red Cross urges residents to take precautions to prevent frozen pipes and offers tips to safely thaw frozen pipes.
Cold temperatures and frozen pipes may lead to house fires, if residents attempt to thaw pipes using inappropriate heating sources, because people may be unfamiliar with severe cold situations.
Damage from frozen pipes can be costly, but avoidable if homeowners practice the following recommendations:
Cold weather tips to prevent frozen pipes:
· Remove, drain and store hoses used outdoors. Close inside valves supplying outdoor hose bibs. Open outside hose bibs to allow water to drain. Keep the outside valve open, so that any water remaining in the pipe can expand without causing the pipe to break.
· Check around the home for other areas where water supply lines are located and are in unheated areas. Look in the basement, crawl space, attic, garage, and under kitchen and bathroom cabinets. Both hot and cold water pipes in these areas should be insulated. A hot water supply line can freeze just as a cold water supply line can freeze, if the water is not running through the pipe and the water temperature in the pipe is cold.
· Consider installing specific products made to insulate water pipes, like a “pipe sleeve” or installing UL-listed “heat tape,” “heat cable” or similar materials on exposed water pipes. Many products are available at your local building supplies retailer. Pipes should be carefully wrapped, with ends butted tightly and joints wrapped with tape. Follow manufacturer’s recommendations for installing and using these products. Newspaper can provide some degree of insulation and protection to exposed pipes — even one-quarter inch of newspaper can provide significant protection in areas that usually do not have frequent or prolonged temperatures below freezing.
During cold weather, take preventive action
· Keep garage doors closed if there are water supply lines in the garage.
· Open kitchen and bathroom cabinet doors to allow warmer air to circulate around the plumbing. Be sure to move any harmful cleaners and household chemicals up out of the reach of children.
· When the weather is very cold outside, let the cold water drip from the faucet served by exposed pipes. Running water through the pipe — even at a trickle — helps prevent pipes from freezing because the temperature of the water running through it is above freezing.
· Keep the thermostat set to the same temperature both during the day and at night. By temporarily suspending the use of lower nighttime temperatures, you may incur a higher heating bill, but you can prevent a much more costly repair job if pipes freeze and burst.
· If you will be going away during cold weather, leave the heat on in your home, set to a temperature no lower than 55ºF.
Thawing frozen pipes
If you turn on a faucet and only a trickle comes out, suspect a frozen pipe. Locate the suspected frozen area of the water pipe. Likely places include pipes running against exterior walls or where your water service enters your home through the foundation.
· Keep the faucet open. As you treat the frozen pipe and the frozen area begins to melt, water will begin to flow through the frozen area. Running water through the pipe will help melt more ice in the pipe.
· Apply heat to the section of pipe using towels soaked in hot water wrapped around the pipe, an electric heating pad wrapped around the pipe, or an electric hair dryer set (Do not use electrical devices if there is standing water). Note: Do not use a blowtorch, kerosene or propane heater, charcoal stove or other open-flame device. A blowtorch can make water in a frozen pipe boil and cause the pipe to explode. All open flames in homes present a serious fire danger, as well as a severe risk of exposure to lethal carbon monoxide.
· Apply heat until full water pressure is restored. If you are unable to locate the frozen area, if the frozen area is not accessible or if you can’t thaw the pipe, call a licensed plumber.
· Check all other faucets in your home to find out if you have additional frozen pipes. If one pipe freezes, others may freeze, too.
The American Red Cross is a non-profit, humanitarian agency dedicated to helping make families and communities safer at home and around the world. Learn more about emergency preparedness or Red Cross Chapters in Washington state here.