Pex pipe: bad or busted? the ultimate guide to pipe safety

PEX (cross-linked polyethylene) pipes have gained significant popularity in plumbing systems due to their flexibility, corrosion resistance, and ease of installation. However, despite their widespread use, concerns linger regarding their potential drawbacks. In this comprehensive guide, we will delve into the truth behind the rumors, exploring the pros and cons of PEX pipes and addressing the question: is PEX pipe bad?

Understanding the Pros of PEX Pipes

Flexibility and Durability

PEX pipes are renowned for their flexibility, allowing for easy bending and maneuvering around obstacles, making them ideal for retrofitting and tight spaces. Additionally, their resistance to freezing and thawing cycles enhances their durability and longevity.

Corrosion Resistance

Unlike metal pipes, PEX pipes are highly resistant to corrosion, which can cause leaks, discoloration, and reduced water flow. This resistance ensures a clean and reliable water supply, minimizing the risk of contamination.

Ease of Installation

PEX pipes can be connected using simple crimping or push-fit fittings, eliminating the need for soldering or welding. Their lightweight and flexible nature simplifies the installation process, saving time and labor costs.

Addressing the Cons of PEX Pipes

Potential for Chlorine Degradation

PEX pipes may be susceptible to degradation when exposed to high levels of chlorine in water. Over time, this exposure can weaken the pipe material, leading to reduced performance and potential leaks.

Oxygen Barrier Issues

PEX pipes can allow oxygen to permeate through their walls, which can accelerate corrosion in metal components within the plumbing system. To mitigate this issue, oxygen barrier PEX pipes have been developed, providing additional protection against oxygen diffusion.

Temperature Limitations

PEX pipes have a maximum temperature rating of 180°F (82°C), which may limit their use in certain applications, such as hot water lines or radiant heating systems. Exceeding the temperature rating can compromise the integrity of the pipe.

Is PEX Pipe Bad? The Verdict

Based on the evidence presented, PEX pipes are generally not considered bad. They offer numerous advantages, including flexibility, durability, corrosion resistance, and ease of installation. However, it is crucial to be aware of their potential drawbacks, such as chlorine degradation, oxygen barrier issues, and temperature limitations.

Considerations for Using PEX Pipes

Water Quality

If your water supply contains high levels of chlorine, it is advisable to use oxygen barrier PEX pipes or consider alternative piping materials.

Temperature Requirements

For applications involving temperatures exceeding 180°F (82°C), alternative piping materials, such as copper or CPVC, may be more suitable.

Professional Installation

To ensure proper installation and minimize the risk of future issues, it is recommended to hire a licensed plumber experienced in working with PEX pipes.

Alternative Piping Materials

Copper

Copper pipes are durable, corrosion-resistant, and have a long lifespan. However, they are more expensive than PEX pipes and require skilled soldering for installation.

CPVC

CPVC (chlorinated polyvinyl chloride) pipes are also resistant to corrosion and chlorine degradation. They are relatively inexpensive and easy to install, but they have a lower temperature rating than PEX pipes.

PVC

PVC (polyvinyl chloride) pipes are lightweight, inexpensive, and easy to work with. However, they are not as durable as other materials and can become brittle over time.

A Balanced Conclusion

PEX pipes offer a viable and generally reliable solution for plumbing systems. While they have some potential drawbacks, these can be mitigated with proper selection and installation. By understanding the pros and cons of PEX pipes, you can make an informed decision about the best piping material for your specific needs.

Questions We Hear a Lot

1. Is PEX pipe safe for drinking water?

Yes, PEX pipes are approved for use in potable water systems and meet industry standards for safety.

2. Can PEX pipes be used outdoors?

Yes, but they should be protected from direct sunlight to prevent degradation.

3. How long do PEX pipes last?

PEX pipes have a lifespan of 25-50 years, depending on water quality and installation conditions.

4. Are PEX pipes noisy?

PEX pipes are generally quieter than metal pipes, reducing noise levels in plumbing systems.

5. Can PEX pipes be painted?

Yes, but it is recommended to use a paint specifically designed for PEX pipes to avoid damage.