Alexei Volkov
Frozen pipes are a common problem during winter, and can cause a lot of inconvenience and damage. When water freezes, it expands, and this expansion can put pressure on pipes, causing them to crack or burst. This can result in leaks and flooding, which can be costly to repair. To unblock frozen pipes, it is important to first locate the frozen section of the pipe and then apply heat to that area. However, it is crucial to avoid using open flames or corrosive drain cleaners, as these can be dangerous and cause further damage. Instead, safe methods to unblock frozen pipes include using a hair dryer, heat lamp, electric heating pad, or hot water. Preventative measures, such as proper insulation and maintaining a consistent temperature, can also help to avoid frozen pipes.
| Characteristics | Values |
|---|---|
| Cause of frozen pipes | Faulty taping, inadequate insulation, or extremely cold temperatures |
| How to locate frozen pipes | Turn on faucets and check for leaks; Feel or tap exposed pipes to identify frozen sections |
| Prevention methods | Insulate pipes with foam pipe wrap; ensure thermostat is set to at least 55 °F (13 °C) during winter |
| Safe thawing methods | Use a hair dryer, heat lamp, electric heating pad, or space heater; wrap pipes with towels; pour hot water down drain |
| Unsafe methods | Avoid open flames, corrosive drain cleaners, and boiling water |
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What You'll Learn
Locate the frozen pipe
Locating a frozen pipe can be tricky, especially if it's within a wall. Here are some steps to help you locate the frozen pipe in your home:
Firstly, if none of the faucets or water fixtures in the house are working, the frozen water is likely in the main water pipe supplying water to the house. If only one faucet isn't working, check the pipes connected to that specific faucet for signs of freezing.
Next, narrow down the possibilities by checking areas with less heat, such as the basement, attic, crawl spaces, unused rooms, and rooms with exterior walls. Pipes in these areas are more vulnerable to freezing.
Grab a flashlight and look for signs of frost or condensation on the pipes in these areas. In warmer rooms, you may see small pools of water below a pipe where condensation has been collecting. If you suspect a pipe is frozen but see no ice, use your hands to feel along the pipe to find the frozen spot.
Exposed pipes are more likely to freeze first, so check for ice blockages in any feeder pipes, bare pipes, or uncovered pipes near the affected faucet or shower.
If you suspect the frozen pipe is within a wall, you may be able to feel a temperature difference along the wall where the pipes are located. This method is imprecise, but it can help in certain cases.
Another way to detect frozen pipes within walls is to check for areas where insulation may be lacking or damaged, as insufficient insulation increases the risk of frozen pipes.
If you are unable to locate the frozen pipe, it is best to call a licensed plumber to help identify and fix the issue.
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Use a hair dryer
If your pipes are frozen, you can use a hair dryer to heat them up. Start by turning on the faucet to relieve pressure as you work. Then, turn on your hair dryer and run it back and forth along the length of the exposed pipe, moving towards the frozen area. Do not place the hair dryer directly on the pipe, as this could cause damage.
If your pipe is made of PVC, be aware that these pipes can be damaged at temperatures as low as 140 °F (60 °C). Keep the hair dryer moving to avoid hot spots, which can damage the piping. You can also wrap electrical heat tape around the pipe to help keep it warm. This tape is regulated by a thermostat, which is triggered once the temperature goes below your specified threshold.
If you have access to a heating pad, warmed towel, or a wet towel that has been soaked in hot water, these can also be used to warm the pipe. Wrap the pipe with the hot towel, or place the heating pad near the pipe, and wait for 20-30 minutes. Once the time has passed, turn on the taps. If no water comes through, try the process again.
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Apply indirect heat
If you have frozen plastic pipes, you should never use direct heat to unblock them. Instead, you can apply indirect heat in the following ways:
Space Heater
If your frozen pipe is indoors, you can place a space heater near the pipe and turn it on. Make sure to keep the heater away from flammable materials and follow the manufacturer's recommendations. If the frozen pipe is under a sink, place the heater near the area with the door open. Check the plumbing periodically to see if the pipe has defrosted.
Heating Pad
Wrap an electric heating pad around the frozen pipe. This will gradually heat the pipe and help to melt the ice.
Hair Dryer
Use a hair dryer to slowly thaw the pipe. Turn the hair dryer on and run it back and forth along the frozen pipe. This method is safer than using direct heat, but be careful not to place the hair dryer too close to the pipe to avoid further damage.
Hot Water
Wrap a heavy towel or burlap bag around the pipe and secure it. Place a bucket under the pipe to catch any runoff water, then pour hot or boiling water over the towel. This will help to concentrate and hold the heat against the pipe.
Heat Tape
Wrap electrical heat tape around the frozen pipe. This tape consists of heating elements that will warm up when turned on, safely warming the pipe. Make sure to wrap the tape in a single layer and do not overlap it.
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Avoid using corrosive drain cleaners
If you turn on your faucet during winter and no water comes out, you probably have a frozen pipe. Frozen pipes are incredibly problematic as they leave you without water in your home. Water freezes in pipes due to faulty taping, inadequate insulation, or extremely cold temperatures.
When water freezes, it expands, which can cause a rupture in the pipe. This can result in a serious situation beyond just a temporary loss of water. For example, a severe chemical reaction may occur if you use corrosive drain cleaners, resulting in the release of poisonous gas or substances that could cause serious health issues, such as blindness. Therefore, it is important to avoid using corrosive drain cleaners.
Instead, you can try to unblock frozen pipes by gradually heating them. However, do not apply extreme heat or use an open flame, as this may damage the pipe. You can use a blow dryer or a heat lamp as a heat source. If you want to use hot water, be careful until the ice melts and drains. Have a bucket ready to catch the overflow and be careful not to scald yourself.
If you are unsure about the location of the frozen pipe, you can try to narrow it down by turning on your faucets and checking for leaks. The faucet with no water is likely the one with a frozen pipe. The pipe is most likely located on an exterior wall, in an uninsulated crawl space, attic, or basement, or near cold air vents or cold concrete.
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Preventative measures
To prevent frozen pipes, it is important to insulate them, especially in unheated interior areas like basements, crawl spaces, attics, garages, and kitchen cabinets. Pipes that run against exterior walls with little to no insulation are also at risk. Use foam pipe wrap or heat tapes to insulate your pipes.
Before the onset of cold weather, it is recommended to drain water from swimming pool and water sprinkler supply lines, as well as disconnecting and draining hoses and closing valves on outdoor hose bibs.
Another preventative measure is to keep your faucets turned on slightly so that water drips or trickles through. This can help prevent pipes from becoming clogged with ice particles. It is also important to maintain your plumbing and heating systems by servicing them annually to stay on top of any small problems.
If you are going away during cold weather, it is advised to leave the heat on in your home, set to a temperature no lower than 55°F (12°C). Keeping the thermostat at the same temperature during the day and night can also help prevent frozen pipes.
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Frequently asked questions
If you turn on a faucet and nothing comes out, or only a trickle, you likely have a frozen pipe. Pipes located against exterior walls or where your water service enters your home through the foundation are the most likely to freeze.
If you can access the frozen section of the pipe, you can apply heat directly to that area. You can use a hair dryer, a heat gun, or a portable space heater. If you cannot access the frozen section, you can try to heat the pipe indirectly by raising the temperature in the room with a space heater.
Never use an open flame, such as a blowtorch, candle, or lighter, to thaw a frozen pipe. This could cause a fire or further damage the pipe. Do not pour boiling water or corrosive drain cleaners down the drain, as this can increase the risk of bursting a pipe.
If you are unable to locate or access the frozen area, or if you cannot thaw the pipe, call a licensed plumber.
