Maya Ellison
Water freezing in pipes is a common problem that can lead to significant damage and costly repairs. When water freezes, it expands, and this expansion puts pressure on the pipes, which can cause them to burst. This is true for both metal and plastic pipes. Plastic pipes are more prone to cracking and splitting due to their inability to properly contract and expand in response to cold temperatures. Therefore, it is essential to take steps to prevent pipes from freezing during cold weather, such as insulating pipes and keeping them inside the home whenever possible.
| Characteristics | Values |
|---|---|
| Effect of freezing water on plastic pipes | Plastic pipes are more resistant and durable than metal pipes. However, they are not immune to freezing. Plastic pipes are more prone to cracking and splitting due to their inability to contract and expand in response to cold temperatures. |
| Preventing plastic pipes from freezing | Insulating plastic pipes is a simple and affordable solution to prevent freezing. Specific products like pipe sleeves, heat tape, and heat cable can be used. In addition, keeping pipes inside the home, away from poorly insulated walls, can reduce the risk of freezing. |
| Thawing frozen plastic pipes | Applying heat to the affected section of the pipe using electric heating pads, hair dryers, or portable space heaters can help thaw frozen pipes. Wrapping the pipe with hot towels is another effective method. |
| Signs of frozen pipes | Reduced or no water flow from taps, water pooling on the floor, or wet spots on walls or ceilings can indicate frozen or burst pipes. |
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What You'll Learn
Plastic pipes can freeze and burst
To prevent this from happening, pipes should be insulated, and this is an affordable and simple solution. This can be done by using foam pipe insulation, UL-listed "heat tape," "heat cable," or similar materials. Newspaper can also provide some degree of insulation and protection. Pipes should be kept inside the home wherever possible, and away from poorly insulated walls. In very cold weather, it is recommended to let the cold water drip from the faucet to prevent water from freezing in the pipe.
If a pipe freezes, there are a few steps that can be taken to address the issue. If the pipe is underneath a kitchen or bathroom sink in a cabinet, the doors can be opened to expose the pipe to the residence's heat. A hairdryer can then be used to heat the coldest area of the pipe and break up the ice. If this does not work, a licensed plumber should be called.
A frozen pipe can be a mere inconvenience, perhaps stopping the water flow to one tap. However, if a critical component or pipework on a heating system freezes, it could cause a catastrophic failure. A burst pipe can cause significant damage to a property, and the average cost of resulting damages is over $10,000.
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Insulation can prevent freezing
Water expands when it freezes, and this expansion puts pressure on the pipe from the inside. This can cause pipes to burst, resulting in costly damage. Pipes located in attics, basements, crawl spaces, and against exterior walls that have little or no insulation are particularly vulnerable to freezing.
To prevent pipes from freezing, it is important to insulate them. Pipe insulation, or lagging, keeps the heat in the pipes and is commonly used to insulate central heating pipework and pipes in loft spaces. It is simple, affordable, and effective in preventing the inconvenience and danger of frozen pipes.
There are several types of pipe insulation available, including "pipe sleeves", "heat tape", "heat cable", and foam pipe insulation. Newspaper can also provide some degree of insulation and protection for exposed pipes. It is important to use insulation that has been approved to British Standards (BSI) to ensure it has been tested appropriately.
In addition to insulating pipes, there are several other measures that can be taken to prevent pipes from freezing. These include sealing drafts, keeping garage doors closed if there are water supply lines in the garage, opening kitchen and bathroom cabinet doors to allow warmer air to circulate, and letting cold water drip from faucets served by exposed pipes.
By taking these preventative measures, homeowners can avoid the inconvenience, cost, and danger associated with frozen pipes.
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Thawing frozen pipes
Water expands when it freezes, and this expansion puts pressure on metal or plastic pipes. This can cause pipes to break, which can be hazardous to a home and its residents.
To thaw a frozen pipe, first determine which pipe or pipes are frozen. Turn on the faucets in your property. If no water comes out, or only a slight trickle escapes, then a pipe leading to the faucet is likely frozen. If one pipe is frozen, there is a chance others have frozen, too. If the pipes are exposed, you may be able to see the frozen portion of the pipe. Frozen pipes often have frost on them or may have a slight bulge.
Before you begin attempting to thaw a frozen pipe, open the faucet that the pipe feeds water into. Make sure to open both the hot and cold handles. This will help to relieve pressure in the system and will allow the water to escape once you begin to thaw the pipe. You should always begin the thawing process near the faucet and work your way down to the blockage. This will help ensure that the melting ice and steam is able to escape through the open faucet. If you start the thawing process closer to the blockage, the melting ice could get stuck behind it, creating more pressure in the pipe and increasing the chances of it bursting.
If the frozen pipe is located in an area you can easily access, you have several options for attempting to thaw the pipe. You should continue to apply heat until the water escaping from the faucet returns to full strength.
- Electric heating pad wrapped around the pipe
- Electric hair dryer
- Portable space heater (kept away from flammable materials)
- Wrap pipes with towels soaked in hot water
- Thermostatically controlled heat tape
Do not use a blowtorch, kerosene or propane heater, charcoal stove, or other open-flame devices. If you are unable to locate the frozen area, or if the frozen area is not accessible, or if you can't thaw the pipe, call a licensed plumber.
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Plastic pipes are worse conductors of heat
Plastic pipes are a versatile and widely used solution in modern plumbing and fluid transportation systems. They are crafted from synthetic polymers such as polyvinyl chloride (PVC), polyethylene (PE), and cross-linked polyethylene (PEX). However, one of their main drawbacks is their poor thermal conductivity compared to traditional metallic pipes.
The thermal conductivity of copper, a common metal used in plumbing, is approximately 413 W/mK, while most plastics fall in the range of 0.19-0.25 W/mK. This means that plastic pipes are worse conductors of heat, resulting in longer heat transfer times and increased energy consumption. This inefficiency leads to higher operating costs and emissions, potentially outweighing the initial cost savings of installing plastic pipes.
The impact of heat on plastic pipes is an essential consideration. Heat infiltrating the pipes increases the kinetic energy of the polymer molecules, leading to their expansion. This expansion is more pronounced in plastics due to their long chains of polymers, and it can result in stress accumulation and potential structural issues if the pipes are rigidly anchored. Additionally, prolonged exposure to elevated temperatures can cause a gradual deformation called "creep," leading to the sagging of pipelines over time.
To prevent issues caused by freezing water, such as pipe bursts, it is crucial to insulate pipes, especially those exposed to severe cold or located in unheated interior areas. This can be done through pipe lagging or specific products like pipe sleeves, heat tape, or heat cable. Running water through the pipes, even at a trickle, also helps prevent freezing.
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Plastic pipes are more prone to cracking
Plastic pipes are more susceptible to damage than pipes made from other materials. One of the leading causes of plastic pipe failure is environmental stress cracking (ESC). ESC occurs when the piping material is subjected to both mechanical stress and certain types of chemicals. Strong mechanical stress, such as impact, can cause the pipe to break, while a strong solvent can cause it to soften or dissolve.
Even moderate levels of stress and chemicals can cause cracks in plastic pipes when they work together. For example, a moderate stress that wouldn't typically break the pipe, combined with a moderate chemical that wouldn't usually dissolve the pipe, can still cause a crack. This occurs when the stress pulls on the molecules of the polymer, and the chemical weakens the molecules at the tip of the crack. As the stress continues to pull on the molecules, the crack propagates until it breaches the pipe wall.
The quality of manufacturing can also affect a pipe's resistance to chemicals and ESC. Issues during the installation process, such as overtight clamping, improper hanger spacing, and failure to account for thermal expansion, can lead to elevated stress levels that enable cracking in a poorly installed system. Additionally, external chemical exposure from ancillary construction products, such as firestopping materials or thread sealants, can contribute to ESC.
To prevent ESC, it is crucial to consider the potential mechanical stresses and chemicals that will affect the piping system's performance and address them during the system design and installation. Following the manufacturer's installation instructions can help minimize mechanical stress. Specific products, such as a "'pipe sleeve' or 'heat tape,' can also be installed to insulate water pipes and provide protection from freezing temperatures.
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Frequently asked questions
When water freezes, it expands. This expansion puts pressure on the pipe, which can lead to cracks and splits. This is true for all pipes, including plastic ones.
Insulating your pipes is the best way to prevent them from freezing. This can be done by installing a "pipe sleeve" or "heat tape". You can also wrap pipes with towels soaked in hot water or use an electric heating pad.
Apply heat to the pipe using an electric heating pad, an electric hair dryer, or a portable space heater. If you are unable to thaw the pipe, call a licensed plumber.
