What is the difference between a CPVC and UPVC pipe?

February 15,2023

What is the Difference Between a CPVC and UPVC Pipe?

Numerous pipe kinds are employed in both residential and commercial structures. Due to its dependability, rigidity, and corrosion resistance, CPVC and UPVC pipe are two common options.

Both CPVC and UPVC are thermoplastics made from polyvinyl chloride resin that have been chlorinated. A double carbon unit is chemically bound to two hydrogen and chlorine atoms in CPVC. Following that, other molecules combine with this one to create CPVC polymer chains.

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Although CPVC and UPVC are both frequently used plumbing materials, there are some significant differences between the two that can affect which is best for a given application. The most significant distinction is that, when placed properly, CPVC pipe is more durable than PVC pipe and can last longer.

In comparison to other materials like copper or PEX, CPVC is also more resistant to the corrosive effects of chlorine. Because of this, it is a great option for drain and water supply piping in residential homes.

A CPVC pipe's longevity is largely determined by how it is installed and treated. A CPVC system can readily damaged by improper installation or excessive pressure. This might cause joints to break, leaks, or even a house fire.

When installed and cared for properly, a CPVC pipe can last up to 50 years or longer. However, CPVC may become more fragile over time, necessitating careful handling and maintenance. Working with a lot of the material and in inclement weather might make this challenging.

The amount of heat that a CPVC pipe is exposed to is another element that affects its longevity. A CPVC pipe should not be heated because doing so could cause the plastic to soften and degrade.

Additionally, it's crucial to select the proper sizing scheme for your CPVC pipes and fittings. Standard CPVC pipe sizes include Nominal Pipe Size (NPS) and CTS (Copper Tube Size).

Knowing which size approach is best for your project is crucial because both have distinct PSI restrictions. If you're unsure, look for this information in the manufacturer printing on the pipe.

Remember that CPVC pipe can tolerate temperatures up to 200degF while PVC pipe can only resist temperatures up to 140degF. Over this temperature range, the plastic might become softer, which weakens its joints and makes it more likely to split and leak.

It's crucial to use the proper cement for your CPVC and UPVC pipes and fittings as a result. A robust junction that will survive for a long time can be made using a specific cement made for CPVC pipe.


The type of pipe to choose while installing plumbing is among the most crucial considerations. For specific purposes, different types of pipes have distinct advantages, therefore it's critical to pick the proper one.

Both CPVC and UPVC are common materials chosen by homeowners to install new water lines because they are strong and secure. Before buying and installing the two varieties of plastic, you need be aware of a few variations between them.

The main distinction between UPVC and CPVC is that plasticizers are not added to UPVC, which makes it hard. It cannot be formed into other objects, like as furniture, and is not as flexible or bendable as PVC.

UPVC gives a decent lot of durability and strength for its weight even though it is not as tough as PVC. It is also incredibly simple to handle and carry, and it can tolerate high pressure and temperatures.

UPVC is also incredibly low-maintenance and simple to clean. Additionally, it is resistant to rust, which makes a range of uses possible.

Additionally, UPVC is available in a variety of lengths, which makes it simpler for construction workers to reduce the quantity of joints and fittings needed to complete the installation. This minimizes the possibility of leaking and lowers labor expenditures during installation.

The exceptional fire resistance of UPVC is another another significant benefit. Even while certain plastics can burn, UPVC is extremely difficult to ignite and only produces a little quantity of flame when it does.

Another crucial quality for any plumbing system is corrosion resistance, which is a property of rigid UPVC pipes. They are excellent for usage in regions with a lot of rain sin

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Corrosion Resistance

CPVC and uPVC are both durable plastics that can be used in many different applications. However, there are some key differences between the two materials, and knowing this can help you choose the best pipe for your needs.

One of the most important characteristics to consider when choosing a piping material is corrosion resistance. Corrosion can be a serious problem, as it causes water systems to break down and affect the quality of the water that you drink. Fortunately, both CPVC and uPVC pipes have superior corrosion resistance.

This is due to the chlorination process that is used to make these pipes. The UV and high temperatures that are used to activate the chlorine in these piping materials can cause the chlorine to attach itself to the molecular backbone of the polymer, which creates a barrier against corrosive substances.

As a result, these piping materials are extremely resistant to most acids, salts and caustics, as well as many aliphatic hydrocarbons. This makes them an excellent choice for a variety of applications, including drainage and corrosive waste disposal.

Both CPVC and uPVC can be used with a range of chemicals, but the exact chemical compatibility of each material can vary significantly depending on the application. It’s best to consult a chemical compatibility chart and contact technical support to find out which pipe material will be most compatible with the particular chemicals that you plan to use in your system.

chlorinated polyvinyl chloride, or CPVC, is a thermoplastic that is widely used for potable water distribution and corrosive fluid handling. Its chemical resistance to acids, alkalis and salts, coupled with its high strength, make it a preferred choice for industrial applications.

Another important advantage of CPVC is that it can be used with a wide range of temperatures, including extremes. Unlike PVC, which is only effective up to 140deg F, CPVC can handle temperatures up to 210deg F, making it a viable option for more demanding piping projects.

While the above factors have some bearing on the chemical compatibility of these pipes, other variables such as the chemical concentration and temperature of the liquids that will be transported can also impact the performance of CPVC. For example, a phosphate-containing liquid can significantly limit the use of CPVC because of its low strength.

Environmentally Friendly

The most environmentally friendly kind of piping that is currently available is CPVC. The vinyl chloride monomer, which is required for this type of pipe, is made during the production process by electrolysis, which produces chlorine from salt water.

After that, the CPVC molecule is polymerized to create a robust plastic that can withstand high pressures. This thermoplastic can be utilized for a variety of industrial applications and is resistant to a number of chemicals.

This is crucial because numerous industrial processes employ water, extremely acidic compounds, or other materials that might damage pipes. Because CPVC piping is designed to resist corrosion, systems operate more efficiently and cost less to maintain.

Compared to stainless steel and other higher alloys, CPVC is an inexpensive, durable, and ecologically friendly option. Due to its low combustible temperature and high limiting oxygen index, it may operate in hazardous conditions without fear of catching fire or exploding.

When used in accordance with the manufacturer's instructions, it is also highly safe to handle and does not leak chemicals. Because of this, CPVC pipes are excellent for plumbing work in both homes and businesses.

The fact that CPVC is fire-resistant makes it an excellent material for use in industrial applications. It can survive fire without endangering other components or people thanks to its limiting oxygen index (LOI) of 60 and flash ignition temperature of 900 degrees Fahrenheit (482 degrees Celsius).

Both CPVC and UPVC are made of thermoplastics, which are safe for the environment and can be recycled after serving their intended purpose. Furthermore, UPVC is free of toxic compounds like BPA and phthalates that are bad for the environment and your health.

Most of the world's piping is made of UPVC, which has a few special qualities that make it a better choice. Compared to PVC, UPVC is more flexible, more resistant to chemicals, and more hygienic. This makes it a fantastic option for moving water, and installing and maintaining the pipes is simple.