The ultimate guide: is pex pipe your perfect choice for outdoor plumbing?

PEX (polyethylene cross-linked) pipe has emerged as a popular choice for plumbing applications due to its flexibility, durability, and resistance to corrosion. However, one question that often arises is whether PEX pipe can withstand the rigors of outdoor use. This blog post delves into the intricacies of using PEX pipe outside, exploring its limitations, best practices, and the factors to consider when making this decision.

Understanding the Basics of PEX Pipe

PEX pipe is a type of plastic piping made from cross-linked polyethylene. This cross-linking process enhances the strength and flexibility of the pipe, making it ideal for a wide range of applications. PEX pipe is available in various colors, sizes, and configurations, providing versatility and ease of use.

Can I Use PEX Pipe Outside?

The answer to this question depends on several factors, including the type of PEX pipe, the climate, and the specific application. Generally, PEX pipe can be used outside in certain scenarios, but precautions must be taken to ensure its longevity and performance.

Types of PEX Pipe for Outdoor Use

There are two main types of PEX pipe: PEX-a and PEX-b. PEX-a is the most flexible type of PEX pipe and is suitable for outdoor use in colder climates. PEX-b is less flexible but is more resistant to heat and UV radiation, making it a better choice for outdoor use in warmer climates.

Factors to Consider When Using PEX Pipe Outside

Climate

Extreme temperatures can affect the performance of PEX pipe. In cold climates, PEX pipe can become brittle and susceptible to freezing, while in hot climates, it can expand and soften. Therefore, it is crucial to choose the appropriate type of PEX pipe based on the climate conditions.

UV Radiation

Ultraviolet (UV) radiation from the sun can degrade PEX pipe over time, causing it to become brittle and weak. To protect PEX pipe from UV radiation, it should be installed underground, covered with insulation, or painted with a UV-resistant coating.

Mechanical Stress

PEX pipe is flexible but can be damaged by excessive bending or kinking. When installing PEX pipe outside, it is important to provide adequate support and avoid sharp bends or excessive stress on the pipe.

Best Practices for Using PEX Pipe Outside

To ensure the longevity and performance of PEX pipe outside, follow these best practices:

• Use PEX-a pipe in colder climates and PEX-b pipe in warmer climates.
• Protect PEX pipe from UV radiation by installing it underground, covering it with insulation, or painting it with a UV-resistant coating.
• Provide adequate support for PEX pipe to prevent excessive bending or kinking.
• Avoid using PEX pipe for applications where it will be exposed to high temperatures or chemicals.

In a nutshell: Making an Informed Decision

Whether or not to use PEX pipe outside depends on the specific application, climate, and type of PEX pipe. By considering the factors discussed above and following best practices, you can make an informed decision that will ensure the longevity and performance of your outdoor plumbing system.

Frequently Asked Questions

Q: Can I use PEX pipe for underground water lines?
A: Yes, PEX pipe can be used for underground water lines as long as it is properly protected from UV radiation and mechanical stress.

Q: What type of insulation should I use for PEX pipe outside?
A: Closed-cell foam insulation is recommended for PEX pipe outside as it provides excellent protection from cold and UV radiation.

Q: How deep should I bury PEX pipe outside?
A: The depth at which you bury PEX pipe outside depends on the climate and local building codes. In general, it is recommended to bury PEX pipe at least 12 inches deep.

Q: Can I use PEX pipe for hot water lines outside?
A: Yes, PEX pipe can be used for hot water lines outside, but it is important to use PEX-b pipe, which is more resistant to heat.

Q: How long will PEX pipe last outside?
A: Properly installed and maintained PEX pipe can last for 50 years or more outside.