How to Use a Compression Fitting: Copper to PEX

In the world of plumbing, one common challenge faced by professionals and DIY enthusiasts alike is the need to connect different types of pipes. One such connection that frequently arises is joining copper pipes with PEX pipes. While there are various methods for achieving this, using a compression fitting has proven to be a reliable and straightforward approach. The beauty of a compression fitting lies in it’s ability to create a leak-proof seal without the use of soldering or other specialized tools. This makes it an ideal choice for those who want a simple yet effective solution for transitioning from copper to PEX. By understanding the steps involved and following the proper technique, anyone can confidently tackle this connection method and ensure a secure and durable joint between the two materials. So, if you're looking to learn how to use a compression fitting to connect copper pipes to PEX, read on to discover the essential tips and guidelines that will enable you to accomplish this task with ease.

Are Compression Fittings Good for PEX?

Compression fittings are versatile and effective for connecting various types of tubing, including PEX. PEX, or cross-linked polyethylene, is a popular choice for plumbing applications due to it’s flexibility, durability, and resistance to corrosion and chemical damage.

PEX compression fittings are typically made of brass or other corrosion-resistant materials that can withstand the high pressures and temperatures associated with plumbing systems.

Unlike soldering or crimping methods, which may require specialized tools and skills, compression fittings can be easily hand-tightened using just a wrench or pliers. This makes them a convenient option for both professional plumbers and DIY enthusiasts.

Their ease of installation, versatility, and secure connection make them a popular option for professionals and homeowners alike.

Steps for Installing Compression Fittings on PEX Tubing

  • 1. Measure and cut the PEX tubing to the desired length.
  • 2. Slide the compression nut and then the compression ring onto the end of the tubing.
  • 3. Insert the end of the tubing into the compression fitting until it stops.
  • 4. Tighten the compression nut onto the fitting with a wrench until it’s snug.
  • 5. Repeat the process for each additional fitting.
  • 6. Check for any leaks by turning on the water supply and inspecting the connections.
  • 7. If there are no leaks, the installation is complete.

There are numerous ways to connect PEX tubing to copper pipes, but if you’re on a budget, crimp ring or cinch clamp fittings provide a cost-effective option. These fittings utilize a metal band that encircles the PEX tubing, which can be securely fastened using either a crimp ring tool or a cinch clamp tool. By choosing these affordable methods, you can achieve a reliable connection between PEX and copper without breaking the bank.

What Is the Cheapest Way to Connect PEX to Copper?

When it comes to connecting PEX to copper, there are a few cost-effective options available. One such option is using crimp ring fittings. These fittings are designed with a metal ring that’s placed over the PEX tubing. By using a crimp ring tool, you can compress the ring and secure the tubing tightly to the fitting. This method is relatively inexpensive and provides a reliable connection.

By providing a secure connection without breaking the bank, these fittings are ideal for those looking for an affordable solution.

It’s essential to ensure that the fittings and tools are of good quality to avoid potential leaks or other issues.

Whether you choose crimp ring or cinch clamp fittings, it’s important to follow the manufacturers instructions and utilize proper tools to ensure a successful connection.

Step-by-Step Guide for Connecting PEX to Copper Using Crimp Ring Fittings

  • Step 1: Gather the necessary tools and materials, which include PEX tubing, copper fittings, crimp ring fittings, crimping tool, pipe cutter, and deburring tool.
  • Step 2: Measure and mark the desired length of PEX tubing, making sure to account for any necessary bends or curves.
  • Step 3: Use a pipe cutter to cut the PEX tubing to the desired length, ensuring a clean and straight cut.
  • Step 4: Use a deburring tool to remove any rough edges or burrs from the cut end of the PEX tubing.
  • Step 5: Slide a crimp ring onto the PEX tubing, making sure it’s positioned correctly for the copper fitting to be inserted.
  • Step 6: Insert the copper fitting into the end of the PEX tubing until it’s fully seated.
  • Step 7: Slide the crimp ring up to the edge of the copper fitting, ensuring it’s positioned correctly.
  • Step 8: Use a crimping tool to crimp the crimp ring onto the PEX tubing and copper fitting, applying equal pressure on all sides.
  • Step 9: Inspect the connection to ensure it’s secure and leak-free.
  • Step 10: Repeat the process for all desired connections between PEX tubing and copper using crimp ring fittings.

In addition to it’s inherent flexibility and durability, PEX tubing can also be used with compression fittings. This is made possible by utilizing a stainless steel sleeve that’s inserted into the PEX, which provides the necessary strength and stability for the compression shut-offs.

Can You Use Compression Shut Offs on PEX?

Compression shut-offs can indeed be used on PEX (cross-linked polyethylene) pipes. However, in order to ensure a secure connection, it’s necessary to use a stainless steel sleeve known as a PEX compression sleeve. This sleeve is inserted into the PEX pipe, providing it with the necessary strength to withstand the pressure created by the compression fittings.

Firstly, it allows for a reliable and leak-free connection. The compression fittings create a tight seal between the PEX pipe and the shut-off valve, preventing any water from escaping. This is especially important in areas where water pressure is high or fluctuations in temperature occur.

The compression fittings can easily be adjusted or removed, allowing for easy disconnection or repositioning of the shut-off valve. This is particularly beneficial in situations where renovations or modifications are necessary.

It prevents the pipe from collapsing or deforming when pressure is applied, ensuring the integrity of the connection. This is crucial in avoiding potential leaks or ruptures that can lead to water damage and costly repairs.

Following the manufacturers instructions and guidelines for tightness and torque is crucial in achieving a secure and reliable connection. Additionally, regular maintenance and inspections should be performed to identify any signs of wear or deterioration in the compression fittings or PEX pipe.

Compatibility of Compression Shut-Offs With Different Types of PEX Pipes (PEX-A, PEX-B, PEX-C)

  • Introduction to compression shut-offs
  • PEX pipes and their different types: PEX-A, PEX-B, PEX-C
  • Overview of compatibility concerns
  • PEX-A compatibility with compression shut-offs
  • PEX-B compatibility with compression shut-offs
  • PEX-C compatibility with compression shut-offs
  • Benefits of using compression shut-offs with PEX pipes
  • Considerations for installation
  • Conclusion and final thoughts

Brass fittings are commonly used in conjunction with PEX (cross-linked polyethylene) piping systems due to their durability and reliability. The strength of brass fittings ensures a secure connection with PEX pipes, providing a long-lasting and dependable solution for plumbing applications.

Can I Use Brass Fittings With PEX?

Yes, you can use brass fittings with PEX pipes. Brass is a popular choice for PEX fittings due to it’s durability and reliability. It offers excellent strength and can withstand high pressure and temperature variations commonly found in plumbing systems.

Brass fittings are designed to provide a secure and leak-proof connection, preventing water from seeping out or causing damage to the surrounding area. This feature is crucial for maintaining the integrity of the plumbing system and avoiding costly repairs.

Their strength, corrosion resistance, and compatibility with various types of PEX make them a popular choice among plumbers and homeowners alike.

Benefits of Using Brass Fittings With PEX

Brass fittings have several advantages when used with PEX piping. Firstly, brass is highly durable and corrosion-resistant, ensuring that the fittings will last for a long time. This makes them a reliable choice for plumbing applications. Secondly, brass fittings provide a secure and leak-free connection to the PEX pipe, thanks to their compression or barbed connections. This eliminates the risk of water leakage, enhancing the overall efficiency and safety of the plumbing system. Additionally, brass fittings have a high temperature tolerance, making them suitable for both hot and cold water applications. Finally, brass fittings are widely available and compatible with various PEX pipe sizes, making them easily accessible and convenient to use.

In contrast, PEX B fittings are crimp-style fittings, which are smaller in diameter and don’t require an expansion tool. With crimp-style fittings, the PEX pipe is simply inserted into the fitting, and a crimp ring is used to secure them together. While both PEX A and B fittings serve the same purpose of connecting PEX pipes, their installation methods and tools differ.

Are PEX a and B Fittings the Same?

PEX A and B fittings may seem similar at first glance since they both serve as connectors in PEX plumbing systems. However, there are significant differences between the two types. PEX A utilizes an innovative expansion-style fitting, which sets it apart from PEX B. These expansion fittings appear larger in diameter compared to their PEX B counterparts and involve the use of a specialized tool for installation.

To install a PEX A fitting, one needs to employ an expansion tool to enlarge both the pipe and the sleeve. This expansion allows for easy insertion of the fitting into the expanded pipe and sleeve. The tool helps ensure a secure and watertight connection, eliminating the need for any additional adhesives or clamps.

On the other hand, PEX B fittings are designed for use with a crimping method. The crimping tool compresses a small copper or stainless steel ring over the pipe and fitting, providing a reliable and leak-free seal.

Each fitting type has it’s advantages and disadvantages, such as installation ease, compatibility with different brands, and cost considerations. Therefore, it’s crucial to consider these factors when deciding which fitting to use in a PEX plumbing project.

Environmental Impact of PEX a and PEX B Fittings in Terms of Manufacturing and Disposal

  • Examination of environmental impacts of PEX A and PEX B fittings in manufacturing and disposal
  • Comparative analysis of manufacturing processes
  • Evaluation of energy consumption during production
  • Assessment of raw material extraction and sourcing
  • Investigation into water usage and waste generation during manufacturing
  • Study on potential emissions and environmental hazards
  • Comparison of disposal methods and their impact on ecosystems
  • Exploration of end-of-life recycling options
  • Consideration of long-term effects on soil and water quality
  • Analysis of overall carbon footprint

Source: PEX A vs PEX B: Pros and Cons – Williams Plumbing

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SharkBite brass push-to-connect fittings are designed to be versatile and compatible with various types of pipes, including PEX, copper, CPVC, and HDPE. This makes them a popular choice for many plumbing applications where ease of installation and reliability are key. However, when it comes to PEX specifically, there are different types available, such as PEX A, B, and C. Therefore, the question arises: can SharkBite fittings be used on PEX A? Let’s find out.

Can SharkBite Fittings Be Used on PEX A?

SharkBite fittings are widely recognized for their versatility and ease of use, but when it comes to PEX A pipes, can they be used in conjunction? The answer is a resounding yes!

PEX A pipes, also known as cross-linked polyethylene pipes, are highly flexible and durable, making them a popular choice in residential and commercial applications. Their flexibility allows for easy installation in tight spaces and eliminates the need for additional fittings.

SharkBites brass push-to-connect fittings feature a unique design that allows for quick and secure connections without the need for any special tools or soldering. Simply push the fitting onto the PEX A pipe, and it forms a tight seal using stainless steel teeth and an EPDM O-ring. This design ensures a watertight connection that can withstand high pressures and temperature variations.

This versatility makes them an excellent choice for a wide range of plumbing systems and allows for easy transition between different pipe materials.

With their reliable performance, durability, and ease of installation, you can rest assured that your plumbing system will be secure and leak-free for years to come.

With their proven compatibility and trusted performance, you cant go wrong with this combination. Simplify your plumbing tasks and enjoy the peace of mind that comes with a secure and efficient system.


The key steps involve ensuring proper pipe preparation, choosing the right size fitting, and carefully securing the connection. By following these guidelines, one can confidently create reliable and durable connections between copper and PEX pipes, avoiding leaks and potential damage. It’s important to note that while compression fittings offer convenience and ease of installation, it’s always recommended to consult professional plumbers or adhere to local building codes for specific installation requirements.

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