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Can You Glue CPVC to PVC? The Differences and Ways to Glue Them

CPVC stands for Chlorinated Polyvinyl Chloride. It is a thermoplastic that is created by chlorinating PVC resin. And PVC stands for Polyvinyl Chloride. It is a thermoplastic that is created by polymerizing vinyl chloride monomer.

So, can you glue CPVC to PVC? Yes. CPVC and PVC can be glued together when connecting a new section of CPVC pipe to an existing one. You can also glue both to repair a section of piping that is difficult to replace.

Continue reading as we discuss their key differences, advantages, and disadvantages and how to glue them together. Ok, let’s dive in!

can cpvc be glued to pvc

Can CPVC Be glued to PVC?

Yes, it is possible to glue CPVC to PVC using a specific type of adhesive. However, CPVC and PVC have different chemical compositions, so it is important to use the appropriate adhesive to ensure a secure and long-lasting bond.

Difference Between CPVC and PVC

  • Temperature Resistance: CPVC has a higher temperature resistance than PVC, making it suitable for hot water distribution systems. PVC can handle temperatures up to 140°F, while CPVC can withstand temperatures up to 200°F.
  • Chemical Resistance: CPVC can resist a broader range of chemicals than PVC, including acids, bases, and salts.
  • Cost: PVC is generally more affordable than CPVC, making it a popular choice for low-cost plumbing projects.
  • Installation: PVC pipes are easier to install than CPVC pipes because they require fewer fittings and are more flexible.
  • Application: PVC is suitable for cold water distribution systems and is commonly used for drain and sewer lines. CPVC is ideal for hot water distribution systems and is commonly used for potable water supply lines.

Types Of Adhesives That Can Bond CPVC to PVC

When it comes to bonding CPVC to PVC, two main types of adhesives can be used

  • Transition cement
  • Multi-purpose cement

Factors to consider when gluing CPVC to PVC

When gluing CPVC to PVC, there are several factors to consider to ensure a strong and durable bond.

  • Compatibility of Materials
  • Type of Adhesive
  • Joint Preparation
  • Temperature and Humidity
  • Joint Alignment

Advantages And Disadvantages Of Gluing CPVC To PVC

Now, here are some advantages and disadvantages of gluing these both.


  • Compatibility: PVC and CPVC are both thermoplastics, which means they can be melted and reformed.
  • Versatility: You can create a system capable of handling both hot and cold water, depending on the specific needs of your project.
  • Ease of installation: The process of gluing is faster and simpler. This is beneficial for larger plumbing projects.
  • Longevity: They have a longer lifespan than other materials like copper or galvanized steel.


  • The joint may not be able to handle the same high temperatures as pure CPVC.
  • The joint may not be able to handle as much pressure as a pure CPVC pipe.
  • Over time, the joint may be more prone to leaks or other types of damage.

When Is It Not Recommended To Glue CPVC To PVC?

For instance, if the joint is exposed to high pressure or constant vibration, using a more secure connection method is best. These include welding or using mechanical fittings. Additionally, if the joint is exposed to temperatures above 200°F, CPVC should not be used.

How To Glue CPVC To PVC: Step-by-Step Guide

Here is the step-by-step guide to follow when gluing CPVC to PVC.

Step 1: Measure and cut the CPVC and PVC pipes to the desired length, making sure to deburr the edges.

Step 2: Make sure the surfaces to be joined are clean and free of debris, oil, and grease.

Step 3: Use sandpaper or a PVC/CPVC pipe cleaner to roughen the surface of the pipe ends. This will help the cement to bond better.

Step 4: Apply a generous amount of transition cement to the CPVC pipe end. Be sure to apply the cement evenly around the entire circumference of the pipe.

Step 5: Insert the CPVC pipe end into the PVC fitting or pipe and give it a quarter turn to ensure a good fit.

Step 6: Hold the joint firmly in place for at least 30 seconds to allow the cement to set.

Step 7: Wipe away any excess cement that may have squeezed out of the joint.

Step 8: Allow the joint to dry for at least two hours before applying any pressure or turning on the water supply.

Tips For Ensuring A Strong And Lasting Bond

  • Use the appropriate primer and glue for each material.
  • Apply the primer and glue according to the manufacturer’s instructions.
  • Make sure the pipes are clean and free of any debris.
  • Join the pipes quickly after applying the glue to ensure a strong bond.
  • Hold the pipes in place for at least 30 seconds to allow the glue to set.
  • Let the joint cure for at least two hours before handling or pressurizing the system.

Common Mistakes To Avoid When Gluing CPVC To PVC

  • Using the wrong primer or glue for each material.
  • Applying too little or too much primer or glue.
  • Not cleaning the pipes thoroughly before gluing.
  • Allowing the primer or glue to dry before joining the pipes.
  • Not holding the pipes in place for long enough after joining them.
  • Handling or pressurizing the system before the joint has fully cured.

Alternative Methods to Connect CPVC and PVC

Here are a few alternative methods to connect CPVC and PVC.

Overview Of Other Ways To Connect CPVC And PVC Pipes

  • Threaded Fittings: CPVC and PVC pipes are threaded to match the fittings, which are then screwed onto the pipes.
  • Compression Fittings: These fittings have a nut and a ferrule that compresses around the pipes to create a tight seal.
  • Mechanical Couplings: These couplings have a split design that allows them to be installed without needing to disconnect the pipes.
  • Transition Fittings: This method requires adhesive and primer, but it is a simple and effective solution.

Comparison Of The Effectiveness And Ease Of Use Of Each Method

When it comes to effectiveness, all of the alternative methods discussed above provide a strong and secure connection between CPVC and PVC pipes. However, each method has its pros and cons when it comes to ease of use.

  • Glue methods are generally considered the most straightforward, but they require careful application of adhesive and primer.
  • Threaded and compression fittings may require additional tools and be more difficult to install, but they offer a cleaner and tool-free solution.
  • Mechanical couplings are also easy to install but can be more expensive and require special tools.
  • Transition fittings offer an easy solution specifically designed for connecting CPVC and PVC, but they can also be more expensive than traditional glue methods.

Safety considerations when working with CPVC and PVC

Below are some safety considerations when working with CPVC and PVC.

Importance Of Proper Ventilation And Protective Gear

1. Proper Ventilation

CPVC and PVC emit volatile organic compounds (VOCs) when heated, cut, or sanded. These VOCs can cause respiratory problems, headaches, throat irritation, and other health issues.

That’s why it’s important to work in a well-ventilated area, preferably outdoors or in a room with an exhaust fan. In addition, HCl gas emissions are reduced by increasing the air exchange rate and using exhaust ventilation.

2. Protective Gear

Wearing the right protective gear when working with CPVC and PVC is also important. This includes gloves, eye protection, and protective clothing.

Gloves should be made of a material that is resistant to chemicals and solvents. Gloves made of nitrile or neoprene are effective. And eye protection should be worn to prevent exposure to debris or flying particles.

Coveralls made of Tyvek or other similar materials are effective at preventing skin contact with PVC and CPVC.

Wear long-sleeved shirts, pants, and closed-toe shoes, and make sure that any exposed skin is covered with a barrier cream. Safety is the first priority, so maintain these safety roles.

Potential Hazards Associated With Gluing CPVC And PVC Together

While these adhesives are highly effective at bonding the materials together, they can also pose some hazards that should not be taken lightly.

  • Release harmful toxic fumes if inhaled, leading to respiratory problems, headaches, and other health issues
  • Release of highly flammable fumes  which pose a significant fire hazard
  • Release a variety of chemicals that can cause skin irritation and even chemical burns


Both PVC and CPVC are plastic piping materials used for a wide range of applications.

CPVC has superior temperature and chemical resistance properties, while PVC is less expensive and widely available.

Both materials have advantages and disadvantages. The choice between them depends on the specific requirements of the piping system.

When working with PVC or CPVC, it is important to follow proper safety measures, including wearing protective gear, using solvent cement safely, and following local plumbing codes and regulations.

With proper installation and maintenance, both PVC and CPVC can provide reliable and long-lasting performance for a variety of applications.