PVC vs CPVC: Which Is Right for Your Project?

February 15,2023

PVC Vs CPVC - Which Is Right For Your Project?

Plastic pipe comes in two common varieties: PVC and CPVC. They are frequently employed in drainage, vent, and water supply piping.

Both PVC and CPVC are strong, long-lasting plastics that fend off bacteria, rot, and rust. Each, however, is appropriate for certain circumstances.

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It's critical to select the appropriate materials if your project calls for plumbing. PVC (polyvinyl chloride) is one of the most popular materials for piping). The substance has a lengthy history of use and is reasonably priced.

It is excellent for conveying water and other liquids because it is strong and resistant to some chemicals. But it can only withstand temperatures of up to 140 degrees Fahrenheit before it starts to lose its structure and soften.

CPVC is yet another option for plumbing. The substance shares the same fundamental structure as PVC but has had its chlorine concentration increased by a chemical procedure.

Because of the higher chlorine concentration, CPVC is more resistant to some chemicals, including ammonia or the majority of amines. For some applications, this can make it a better choice than PVC, therefore you should check a chemical compatibility chart before deciding which material is best for your specific project.

CPVC can be used for many different things, such as vent and drainage systems, hot and cold water supply pipes, and industrial liquid handling equipment. Due to its cost-effectiveness and ability to convey flue gases without producing an excessive amount of heat, it is also used to vent furnaces and boilers.

CPVC is offered in NPS (nominal pipe size) and CTS, just like PVC (copper tube size). Both sizes will fit in the same places as copper piping, but it's crucial to confirm the precise size you require before placing your order.

Although CPVC can endure temperatures greater than PVC, it is less flexible and less durable than other polymers. As a result, it might not be the best option for some applications, including venting gas appliances.

High sulfuric acid concentrations can also be handled by CPVC. Additionally, it can tolerate chlorine better, which increases its resistance to certain chemicals and other pollutants.

Both PVC and CPVC are resilient, but which is better for your particular project will depend on a few different aspects. Temperature is one of the most crucial factors.

PVC is temperature-resistant up to 140 degrees, while CPVC is temperature-resistant up to 200 degrees. Both are strong and resistant to specific chemicals, but before choosing between the two for your specific use, you should take a look at a chemical compatibility chart.


The type of project and the quantity of heat the pipes will undergo will determine how long PVC and CPVC will last. For instance, you should use CPVC instead of standard PVC when installing hot water pipe because it can withstand higher temperatures.

CPVC (chlorinated polyvinyl chloride) possesses chemical resistance in addition to thermal resistance. Chlorine is added to its hydrogen composition throughout the production process to increase its resistance to deterioration. This extra chlorine molecule increases the plastic's durability and increases its resistance to high-temperature conditions, making it perfect for applications involving both hot and cold drinking water.

Despite its toughness, UV radiation and other external factors can still harm PVC. You must use UV stabilizers if you plan to place pipes above ground.

This is because sunlight's UV rays can cause the plastic to break down, which can shorten its lifespan. PVC may include toxins that can poison the drinking water in your home, which is another issue.

Although PVC is a sturdy material, it doesn't have the same level of CPVC's corrosion and rust resistance. Fortunately, you may find numerous customised versions of the content that will make it better suited for particular activities and circumstances.

For cable insulation, for instance, a plasticizer will make it softer and more flexible. Additionally, you'll need to use a specific fire retardant if the pipes are going to be exposed to flames.

The needs of different industrial applications can be met by CPVC despite its outstanding temperature and corrosion resistance. It can be utilized in a number of ways, such as a sheet and liner, overwrapped with Fiber Reinforced Plastic (FRP), and more.

You can be certain to discover the ideal PVC or CPVC product with these alternatives. The requirements of your application and the price of each item must be determined.

PVC is a more economical choice for many contractors and businesses. This is because PVC is versatile and simple to install. Long-term savings are possible thanks to the material's low cost and dependability.

If you compare FRP vs PVC, you would first consider the pricing, that FRP is low cost compared to PVC. Yes, vinyl is expensive but it's a long-term, a one time solution but installing FRP calls for frequent repairs. Choose Duramax PVC panels for industrial indoor areas that have a lot of moisture.


Chemical Resistance

There are several things to take into account when selecting a pipe and fitting material. The importance of chemical resistance is one of the highest. This is a term used to describe a material's capacity to withstand the impacts of corrosive chemicals.

Two common materials that can be used in a number of plumbing applications are PVC and CPVC. They aren't the same, though, and knowing the differences between them can help you make a well-informed choice.

The molecular structure of CPVC, commonly known as chlorinated polyvinyl chloride, is very different from that of PVC. About 40% of its backbone structure is made up of chlorine atoms, while just 25% is made up of hydrogen.

Since of these molecular changes, CPVC is frequently advised for piping applications that handle corrosive liquids because it resists corrosion better than PVC. Additionally, it is resistant to the majority of bases, acids, salts, and aliphatic hydrocarbons, extending its lifespan by years or even decades.

For a variety of reasons, thermoplastics like CPVC and PVC are becoming more and more popular. To begin with, they are more affordable and robust than metal. Additionally, they are less prone to pitting, scaling, and corrosion.

However, compared to other thermoplastics, they are less resilient to environmental stress cracking (ESC). To choose the ideal material for your project, ESC testing is advised.

Additionally, organic solvents like chlorinated hydrocarbons and ketones are not very compatible with PVC or CPVC. This is due to a quick dehydrochlorination reaction in the plastic brought on by the solvents in these chemicals.

For this reason, before selecting the material, it's crucial to determine which solvents your piping system may face. The maker of the product should be consulted for the most up-to-date details on chemical resistance.

In the end, you want to work with a respectable piping business that can counsel you and suggest the best materials for your project. They may also assist you in choosing the ideal piping type for your particular application.

The appropriate material must be chosen for your project in order for it to be strong and last for many years. You can save money and bother by choosing the right material rather than having to replace a damaged plumbing system.


The material you select for your home's water plumbing has a significant impact on how well your system works. It establishes the lifespan of your pipes and how frequently you will need to replace them. Your project's installation costs may be impacted by the type of pipe you select.

PVC and CPVC are the two most popular piping materials, and plumbing standards often accept both of them. However, they vary in a number of ways, therefore it's critical to comprehend these before making a purchase.

Temperature resistance is one of the most crucial aspects to consider when selecting a pipe. While both polymers can resist temperatures of up to 200 degrees Fahrenheit, CPVC has a greater temperature range than PVC. Because of this, CPVC is a preferable material for hot water applications.

Sizing is an additional consideration. While CPVC is normally sized using the CTS (Copper Tube Size) method, PVC can be sized in accordance with the IPS (Iron Pipe Size) regulations. The IPS sizing scheme is fundamentally dissimilar than this one, which may cause confusion among homeowners.

No matter the material you choose, it's crucial to check that your pipes satisfy regional specifications before installing them. Make sure your PVC pipes are rated for the water temperature in your area if you're using pvc material. They must be replaced if they are not rated.

Although both PVC and CPVC are frequently used for residential plumbing, homeowners are more likely to favor CPVC because of its greater temperature tolerance. Additionally, it can endure more chemicals than PVC.

Both materials are inexpensive and simple to work with, but your final cost savings will depend greatly on the one you select. Before making a purchase, it is best to speak with a plumber or contractor if you are unsure which pipe is appropriate for your project.

Both PVC and CPVC can be used for pressure and non-pressure systems and come in a wide range of diameters and fittings. They are rust-resistant, dependable, and simple to install. They make excellent choices for fire sprinkler systems.