Maya Ellison
Burst pipes can cause a lot of damage to a property and its belongings, from ruining electronics and furniture to causing rot and damage to the structure and foundation of a home. This can be caused by frozen pipes, which can lead to significant damage if not addressed promptly. While metal pipes may rupture and burst when frozen, are plastic pipes less likely to burst? Plastic pipes are better insulated and more resistant to splitting, but they are still prone to cracking and splitting due to their inability to properly contract and expand in response to cold temperatures.
| Characteristics | Values |
|---|---|
| Plastic pipes are less likely to freeze | Better insulated than metal pipes |
| Plastic pipes are more resistant to splitting | More prone to cracking and splitting due to their inability to properly contract and expand in response to cold temperatures |
| Plastic pipes have thicker walls | Greater resistance to heat flow |
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What You'll Learn
Plastic pipes are better insulated
While metal pipes may rupture and burst when frozen, plastic pipes are more likely to crack and split. This is due to their inability to properly contract and expand in response to cold temperatures. If there is water in plastic pipes when they start to freeze, pressure may build up with no way to escape, leading to cracking.
However, it's important to note that any type of pipe, whether plastic or metal, will freeze and burst if there is water inside them when temperatures drop low enough. Pipes should be insulated and kept inside the home whenever possible to minimise the risk of freezing.
Additionally, it's worth mentioning that PEX pipes, a type of plastic pipe, have been observed to withstand freezing temperatures without bursting. This could be due to their continuous lengths, eliminating the need for fittings in crawl spaces, which are more susceptible to freezing.
In summary, plastic pipes are better insulated than metal pipes, making them less likely to freeze and burst. Proper insulation, regular maintenance, and taking precautions during cold weather are crucial to preventing pipe bursts, regardless of the pipe material.
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Plastic pipes are more resistant to splitting
Plastic pipes are better insulated and less likely to freeze in the first place. Even if they do freeze, they are more resistant to splitting. Plastic pipes have thicker walls and greater resistance to heat flow than copper pipes, which have virtually no resistance to heat flow. This means that plastic pipes can withstand higher temperatures without failing.
However, it is important to note that all pipes, regardless of material, will freeze and burst if there is water inside them when temperatures drop low enough. When water freezes, it expands, and this expansion causes hydraulic pressure in the part of the water last to freeze, which can lead to a burst pipe. This is true for both plastic and metal pipes, but the increased insulation of plastic pipes makes them less susceptible to freezing in the first place.
Additionally, the position of the pipe plays a role in its potential to freeze. Pipes kept inside the home are less likely to be affected by cold weather and will benefit from the heating and insulation of the house. On the other hand, outdoor pipes are more exposed to the elements and have a higher chance of freezing.
To prevent pipes from bursting, it is recommended to drain taps, especially outside taps, to ensure there is no water in the pipes that can freeze and cause a build-up of pressure. Devices like Freeze Miser can also be attached to each faucet to allow water to drip automatically when temperatures reach a certain level, protecting pipes from freezing.
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PVC pipes are prone to cracking
Plastic pipes are generally less likely to burst than metal pipes. Metal pipes may rupture and burst when frozen, but plastic pipes are better insulated and more resistant to splitting. However, this does not mean that plastic pipes are immune to bursting.
PVC pipes, in particular, are prone to cracking and splitting due to their inability to properly contract and expand in response to cold temperatures. When exposed to freezing temperatures for prolonged periods, PVC becomes increasingly brittle and can crack quite easily. If there is water in a PVC pipe when it starts to freeze, pressure may build up with no way to escape, potentially causing the pipe to crack to relieve the pressure. This can occur even if the pipe is indoors.
PVC pipes can also crack if they are exposed to excessively high water pressure. Water pressure that is greater than 80 psi can cause PVC pipes to expand and crack, significantly reducing their expected useful lives. Additionally, PVC pipes should not be exposed to direct sunlight, as UV rays can cause deterioration of the plastic, making it brittle and prone to cracking.
Another common cause of cracking in PVC pipes is over-pressurization. Each size and grade of PVC pipe is rated for a maximum fluid pressure, and exceeding this pressure will cause the pipe walls to fail. PVC pipes can also begin to crack if they are bent too far during installation or subjected to bending and shear forces after installation, such as in the case of foundation settling or an earthquake.
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Pipes burst due to excessive water pressure
Plastic pipes are generally less likely to burst than metal pipes. Plastic pipes are better insulated and more resistant to splitting when frozen. However, plastic pipes are still prone to cracking and splitting due to their inability to contract and expand in response to cold temperatures. If there is water in a plastic pipe when it starts to freeze, pressure may build up with no way to escape, potentially causing the pipe to crack.
Pipes are engineered to withstand specific pressure levels, typically ranging from 50 to 80 pounds per square inch (PSI). However, if the pressure exceeds the pipe's capacity, it can lead to a burst. Water pressure fluctuations within the plumbing system can cause pipes to burst. A sudden and drastic increase in water pressure can cause the pipes to rupture. This can occur due to various factors, including blockages, clogs, and external pressure.
Blockages and clogs can be caused by accumulated debris, grease, or foreign objects restricting the passage within the pipes. This elevation in pressure can lead to a rupture. Clogs can also be the result of mineral accumulation or solid material carried by the water, such as chaff. External pressure can come from tree roots, passing cars, or construction equipment operating near the pipes.
In addition to blockages and external pressure, pipes can burst due to freezing temperatures. When water freezes, it obstructs water flow, increasing pressure within the pipe until it bursts. This is a common issue during winter, when temperatures can drop below -4 degrees Celsius, causing water to turn into a solid and block pipes. Regular maintenance, proper insulation, and allowing faucets to drip during freezing temperatures can help prevent pipes from bursting due to freezing.
Furthermore, corrosion and erosion also contribute to pipe bursts. Over time, pipes can degrade due to chemical reactions with water, soil, or other materials they come into contact with. Corrosion weakens the pipe walls, making them more susceptible to pressure changes and potential bursting. Erosion from abrasive water or debris can wear away the inner lining, compromising the structural integrity of the pipes.
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Pipes should be kept inside the home
Plastic pipes are less likely to freeze and burst than metal pipes. Plastic pipes are better insulated and more resistant to splitting when frozen. Metal pipes, on the other hand, are prone to rupturing and bursting when frozen. If you live in an area with cold temperatures, it is important to take precautions to prevent your pipes from freezing, such as keeping your home warm and using devices like Freeze Miser, which allows water to drip automatically when temperatures reach a certain level.
Additionally, having pipes inside the home provides easier access for maintenance and repairs. Plumbing issues can be complex, and it is important to address them promptly to prevent further damage. With pipes located indoors, plumbers can more easily access and repair any issues, reducing the time and cost of maintenance.
Indoor pipes also contribute to a more convenient and aesthetically pleasing living space. Well-maintained indoor plumbing ensures that water is consistently delivered when needed, without causing disruptions to daily routines. Furthermore, keeping pipes inside the home eliminates the need for unsightly pipe installations or modifications to the exterior of the house.
In summary, pipes should be kept inside the home to mitigate the risk of freezing and bursting, facilitate maintenance and repairs, and maintain a comfortable and functional living environment. By taking precautions during cold weather, regularly maintaining plumbing systems, and prioritising convenient and unobtrusive plumbing designs, homeowners can ensure the longevity and reliability of their pipes.
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Frequently asked questions
Plastic pipes are less likely to freeze in the first place as they are better insulated. They are also more resistant to splitting if they do freeze. However, they are still prone to bursting if there is water inside them when they freeze.
Pipes burst due to excessive water pressure. When water freezes, it expands, and the last part of the water to freeze is what causes the pipe to burst. This is why pipes typically burst where there is little to no ice formation.
To prevent your pipes from bursting, you should drain your taps, especially outside taps, to ensure there is no water in the pipes. Pipes should also be kept inside the home where possible, away from poorly insulated walls.
Yes, a Freeze Miser can be attached to each faucet to allow water to drip automatically when water levels reach 37°F. This ensures a steady trickle of water to protect your pipes.
