Are plastic pipes less likely to burst?

Author: Rene Swift  |  Last update: Wednesday, March 26, 2025

Plastic pipes are also at risk of bursting, but much less so than their copper counterparts. Since they are more flexible than copper pipes, they can usually withstand greater pressure, but they still become a risk when they become more brittle in cold temperatures.

Are plastic water pipes less likely to burst?

No matter what type of pipes you have in the property, plastic or copper, they will freeze and burst if there is water inside them. When temperatures plummet extreme pressure is built up in pipework due to frozen water causing it to burst.

What kind of pipes don't burst?

Most pipe types, if they freeze, will often burst in freezing conditions, but SharkBite PEX pipe is more forgiving. PEX is flexible and performs better in freezing conditions than rigid pipes like copper, PVC and CPVC.

Are plastic pipes ok for plumbing?

Plastic pipes have become a popular choice for new homes. This particular plastic material is relatively new on the plumbing scene and can be used for a variety of plumbing applications. The major difference between PVC and PEX is that PEX pipes are flexible.

Do frozen PVC pipes always burst?

Although common, frozen pipes do not always burst. However, the ice can increase this risk when it thaws and is usually worsened as it raises pressure further which makes pipe bursting common near winter's end or springtime. Furthermore, the more water flowing through the pipe, the greater chance of rupture.

Why do Pipes Burst in Cold Weather?

At what temperature will PVC pipes burst?

As mentioned in the previous section, once the outside temperature drops below freezing (32°F), your pipes are at risk of freezing. However, the chances of damage increase as temperatures drop to 20°F or below.

How long can pipes stay frozen without bursting?

Pipes typically burst when exposed to extremely low temperatures for an extended period of time (anywhere from 1-3 days depending on temperature). This is especially true for pipes located on exterior walls. A frozen pipe is likely to burst when any water or liquid trapped within it freezes and begins to expand.

What are the disadvantages of plastic pipes?

Cons:
  • Plastic pipes are bulkier than metal, which limits their use in small spaces.
  • Some plastic materials can warp under exposure to high heat.
  • Like most pipes, they can break if they are frozen.
  • Plastic lacks copper's antimicrobial effects, and some homeowners consider this a health risk.

Should I replace my copper pipes with PVC?

Copper pipes offer longevity and proven performance, while PVC pipes provide affordability and ease of installation. Ultimately, the decision will depend on your specific requirements, budget, and preferences.

How long do plastic plumbing pipes last?

Based on the use of 50 year stress regression data, it has been incorrectly assumed that plastics pipe systems have a life expectancy of 50 years. In reality, such systems can reasonably be expected to last 100 years or more.

What pipes to avoid?

Polybutylene, Galvanized Steel, and Lead Piping: The Worst Plumbing Pipe Materials.

Can you prevent pipes from bursting?

Check thermometers in your home and make sure that you never allow the interior temperature to fall below 55 degrees Fahrenheit. A quick and easy step to take is to open cupboard doors around sinks. This measure will allow warmer air to spread near the pipes and help prevent bursts.

What plumbing pipes last the longest?

Drainage pipes are often made of cast iron or polyvinyl chloride, or PVC. Cast iron will last anywhere from 75-100 years while PVC wins the award for longest-lasting pipe material with an indefinite lifespan.

Which pipes are most likely to burst?

The pipes most at risk are those in unheated interior spaces such as basements, attics, and garages. But even pipes running through cabinets or exterior walls can freeze. The good news is there are some simple things you can do to keep your water running and your house dry.

How reliable is plastic plumbing?

The pipes and fittings can withstand both heat and pressure. In fact, they're often tested to standards greater than any required in domestic situations. Plastic pipe won't scale up in areas of hard water, reducing the risk of pipe blockages.

How many times can PEX freeze?

"The PPI report references specific research studies that have analyzed the behavior of PEX when subjected to repeated freeze/thaw cycles. A finding of one of these research reports notes that notable conclusions from this research include 'PEX pipe was conclusively shown to be freeze tolerant up to 400+ cycles. '"

Why don't plumbers use copper pipes?

The Cons of Using Copper Pipes

Installation costs: Copper is more expensive than other piping materials. Since they're also rigid, you must incur the cost of elbow fittings. The rigidity makes them more challenging to cut and fix during installation. The longer it takes to handle the materials, the more cost you incur.

Why use PEX instead of PVC?

PVC has been around since the early 1900s and is still used in many homes today. PEX, on the other hand, is a newer material that is often more resistant to corrosion and pressure. So the choice of which pipe to use in your home is ultimately up to you.

What is the best pipe to use for residential plumbing?

What is the best piping for plumbing? PVC pipe is by far the most commonly used pipe in residential homes. This type of pipe is affordable and available in a number of different fittings and sizes. It's also a great choice for most warm and cold water applications.

Why do plumbers use plastic pipes?

Low Heat Conductivity: Many types of plastic piping can handle a wide range of temperatures without warping or cracking. At the same time, their low conductivity helps maintain the temperature of the water inside without creating condensation like copper pipes are prone to do (if not insulated).

What is the main disadvantage of plastic?

Most plastics are non-biodegradable, and once landfilled, they might take a long time to decompose. With an increasing number of plastic products, especially plastic packaging, being discarded quickly after purchase, the amount of landfill space required by plastic waste is becoming a major concern.

What is the problem with plastic water pipes?

Poly B plumbing systems pose significant risks, including susceptibility to deterioration under high temperatures, chlorine degradation, and improper installation. These issues can lead to water leaks and even catastrophic pipe failure, potentially causing substantial damage to homes.

How to prevent pipes from bursting?

5 ways to prevent frozen (and bursting) pipes
  1. Keep thermostats in outbuildings and second homes at 65 degrees. ...
  2. Add insulation to outside walls that contain pipes. ...
  3. Use snap-on insulation for pipes in unheated areas. ...
  4. Install smart technology. ...
  5. Disconnect hoses and protect outside spigots.

Why don't pipes freeze up north?

Generally, houses in northern climates are built with the water pipes located on the inside of the building insulation, which protects the pipes from subfreezing weather.

Does homeowners insurance cover burst pipes from freezing?

Most homeowner and commercial property insurance policies, in general, will cover damage from a frozen pipe that bursts.

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