Can You Bury PEX Underground? Your Comprehensive Guide to PEX Pipes

PEX pipes have become increasingly popular in the plumbing industry due to their flexibility, durability, and ease of installation. But can you bury PEX pipes underground? This is a question that many homeowners and contractors may have when considering the use of PEX pipes for underground plumbing projects.

In this article, we will explore the benefits and considerations of burying PEX pipes underground , can you bury pex underground, the best practices for underground installation, and the types of fittings suitable for this application. Whether you are a homeowner planning a DIY project or a professional plumber looking for guidance, this article will provide you with the information you need to make an informed decision. So, let’s dive in and discover the world of underground PEX piping!

At a glance: What’s behind the topic.What you need to know: An overview of the key information

  • PEX pipes are explained, including their benefits and the different types available (PEX-A, PEX-B, PEX-C).
  • The pros and cons of burying PEX pipes underground are discussed, along with precautions to take.
  • Factors to consider when burying PEX pipes, best practices for underground installation, and suitable fittings are covered.

can you bury pex underground

What is a PEX Pipe?

Imagine a plumbing solution that is not only versatile and convenient but also resistant to corrosion and scale buildup. Introducing PEX pipes , the ultimate choice for all your plumbing needs. Made from flexible plastic, these pipes are incredibly easy to install, saving you time and effort.

But that’s not all. PEX pipes can handle both hot and cold water, making them perfect for a wide range of applications. From your cozy shower to your busy kitchen sink, these pipes have got you covered.

And with their ability to withstand extreme weather conditions, you can use them both indoors and outdoors without worry. PEX pipes are not just durable, they are also designed to maintain optimal water flow and pressure. Say goodbye to rust and mineral deposits that can clog up your pipes and cause damage.

With PEX pipes , you can enjoy a longer lifespan and reliable performance. Whether you’re a homeowner or a professional, PEX pipes offer a reliable and easy-to-install solution for all your plumbing needs. Don’t settle for less when it comes to your plumbing system.

Choose PEX pipes and experience the difference for yourself.

If you’re wondering whether PEX can be safely buried, check out our article “Can PEX be Buried” for all the information you need.

Benefits of Using PEX Pipes

Text rewritten: With their numerous advantages, PEX pipes have become increasingly popular in the plumbing industry. Their durability, longevity, and resistance to corrosion and scale buildup make them a top choice. Unlike traditional metal pipes, PEX pipes are made of flexible plastic, which ensures their longevity.

Not only are PEX pipes durable, but they also have a smooth interior that enhances water flow and reduces friction. This translates to better water pressure and a more efficient plumbing system. The smooth interior also helps prevent debris accumulation, minimizing the risk of clogs and blockages.

One of the standout features of PEX pipes is their ability to resist freezing . They can expand and contract without cracking, making them ideal for cold climates where pipes are prone to bursting. In conclusion, the undeniable benefits of PEX pipes make them an excellent choice.

Their durability , smooth interior for improved water flow , and resistance to freezing have made them a favorite among homeowners and professionals in the plumbing industry. If you’re seeking a reliable and efficient plumbing solution , look no further than PEX pipes.

If you’re considering installing a PEX pipe underground, check out our comprehensive guide on PEX pipe underground installation for all the information you need to ensure a successful and hassle-free installation process.

can you bury pex underground

Different Types of PEX Pipes: PEX-A, PEX-B, PEX-C

In the vast realm of PEX pipes, three dominant forces reign: PEX-A, PEX-B, and PEX-C. These three titans each possess unique qualities that set them apart from one another. PEX-A, the first-born of the trio, possesses an unparalleled flexibility that allows it to gracefully navigate the twists and turns of any plumbing system.

With a heart of steel, it fearlessly endures extreme temperatures, making it a stalwart companion in the face of freezing winters. Its smooth interior channels the water with such ease and grace, enhancing the flow to a mesmerizing level. PEX-B, the middle child, is a beloved choice among many.

Its affordability and reliability have endeared it to the masses. Like a loyal friend, it stands strong against the corrosive forces that threaten its existence. Often found in residential realms, it offers an inviting embrace to those seeking a trustworthy companion for their everyday plumbing needs.

PEX-C, the final contender in this triumvirate, is the embodiment of strength and resilience. Its rigid nature sets it apart from its siblings, making it an ideal candidate for the challenges of the commercial world. Though it may lack the flexibility of PEX-A and the affordability of PEX-B, it compensates with an unmatched endurance that can weather any storm.

When embarking on the quest to find the perfect PEX pipe for your domain, one must consider the factors that lie closest to their heart. Flexibility, durability, and cost all play a crucial role in this decision-making process. Whether you find solace in the graceful dance of PEX-A, the comforting embrace of PEX-B, or the unwavering strength of PEX-C, rest assured that each type possesses its own unique benefits, tailored to suit a variety of applications.

Choose wisely, dear reader, and let your plumbing journey be one of triumph and satisfaction.

can you bury pex underground

Fun Fact: Did you know that PEX pipes have been used in Europe for over 40 years before gaining popularity in the United States?


My name is Warren and I am a professional plumber licensed and insured in the State of California. I have been in the business for over 10 years and have undertaken small and large projects including bathroom renovation, toilets, garbage disposals, faucets, sinks and kitchen plumbing jobs. This site is based on my experience with toilets. I have installed the best brands and models in all sizes and shapes. I hope this helps you with the unbiased information that you need to make the right decision.


Pros and Cons of Burying PEX Pipes

Beneath the earth’s surface, an intriguing choice awaits – burying PEX pipes underground . This decision, like all others, carries with it both advantages and disadvantages. On the bright side, the pipes are shielded from harm’s way, safeguarded against the perils of physical damage and mischievous acts of vandalism.

Such protection ensures longevity, sparing you the burden of costly repairs. Moreover, when time calls for maintenance or repairs, the underground accessibility of the pipes emerges as a savior, saving both time and money in the grand scheme of things. Yet, lurking within the shadows of this buried treasure lies a potential threat – the relentless invasion of tree roots.

These roots, if left unchecked, can infiltrate the buried pipes, leading to leaks and blockages that mar the tranquility of your underground oasis. To combat this danger, one must carefully consider the proximity of trees and plants, taking appropriate measures to secure the sanctity of the pipes. In essence, the act of burying PEX pipes underground bestows upon you a shield of protection and a gateway to effortless maintenance.

However, one must remain vigilant, for the ever-present menace of tree roots looms in the background. Consider the scales, weighing these pros and cons to make a discerning choice tailored to your unique circumstances.

Precautions to Take When Burying PEX Pipes

In the art of burying PEX pipes, meticulous care is of utmost importance. Begin by meticulously examining and preparing the ground, ensuring it is compact and free from any debris or hazardous objects. Provide an additional layer of safeguarding by employing sleeves or wraps as a protective barrier between the pipes and any potential hazards in the soil.

Regularly embark on visual inspections to detect any signs of damage or leaks , promptly addressing any issues that arise to prevent further harm or water wastage . By adhering to these vital precautions, your buried PEX pipes will thrive for years to come, functioning flawlessly. Remember, inspection, preparation, protective sleeves, and regular checks are all indispensable steps in the delicate process of burying PEX pipes.

can you bury pex underground

Comparison of PEX Types for Underground Installations – Tabelle

PEX Type Advantages for Underground Use Disadvantages for Underground Use Recommended Applications for Underground Installation
PEX-A High flexibility, resistant to freeze damage, easy to repair Higher cost compared to other types, potential for expansion noise Residential and commercial plumbing, radiant floor heating
PEX-B Lower cost, resistant to chlorine and harsh chemicals Less flexible compared to PEX-A, potential for kinking Potable water distribution, hydronic heating systems
PEX-C Lower cost, resistant to chlorine and scale buildup Less flexible compared to PEX-A and PEX-B, potential for kinking Residential and commercial plumbing, water service lines
PEX-AL-PEX Excellent oxygen barrier, resistant to corrosion Higher cost compared to other types, specialized tools required for installation Radiant heating systems, potable water distribution
PEX-PEX-AL-PEX High temperature and pressure resistance, excellent oxygen barrier Higher cost compared to other types, specialized tools required for installation Potable water distribution, heating and cooling systems
PEX-PE-RT High temperature and pressure resistance, flexible Higher cost compared to other types, potential for kinking Radiant floor heating, water service lines

Factors to Consider When Burying PEX Pipes

When it comes to burying PEX pipes underground, there are several important factors to keep in mind. The quality of the soil and its ability to drain properly are key considerations that can greatly affect the lifespan of the pipes. Clay soil, for example, tends to retain water, which can increase the risk of corrosion.

On the other hand, sandy soil requires additional measures to prevent pipe movement. The depth at which the pipes are buried is also a crucial factor to consider. Frost depth and groundwater levels play a significant role in determining how deep the pipes should be buried.

In colder climates, burying the pipes deep enough can help prevent freezing and save you from expensive repairs. Groundwater levels, on the other hand, will dictate the appropriate burial depth. Lastly, it’s imperative to take precautions to protect the pipes from any potential damage caused by nearby construction or excavation activities.

Accidental damage can occur if proper measures are not taken. By carefully considering these factors, you can ensure that the PEX pipes remain in excellent condition and provide reliable performance for many years to come.

Understanding the Soil Type

The Influence of Soil on PEX Pipes The soil in which PEX pipes are buried plays a vital role in their stability and overall performance. A compacted soil offers a firm base, minimizing pipe movement. On the other hand, clay soil has a tendency to retain water, which could potentially lead to corrosion issues.

To avoid water buildup, proper drainage is necessary. Additionally, sandy soil with its loose texture can cause pipes to shift. Using bedding materials such as gravel or sand can help ensure stability.

Taking into account the soil type is essential for a successful and long-lasting installation, addressing factors like soil compaction, water retention, and pipe movement.

can you bury pex underground

Using Insulated PEX Pipes for Underground Use

Revolutionary and transformative, insulated PEX pipes redefine the world of underground plumbing. With a multitude of advantages, these pipes elevate the performance and longevity of your plumbing system to extraordinary heights. A remarkable feature of insulated PEX pipes is their remarkable ability to shield against the whims of temperature.

Unyielding to scorching summers or freezing winters, they act as an impenetrable fortress, steadfastly preserving the water inside from the clutches of extreme weather. No matter the season, you can relish in the bliss of a consistent water temperature. In frigid climates, the benefits of insulated PEX pipes are even more pronounced.

They serve as a formidable barrier , staunchly guarding against the loss of precious heat and ensuring the water within remains warm and inviting. Not only does this save you substantial energy costs , but it also bestows unparalleled convenience and comfort upon you and your loved ones. Additionally, insulated PEX pipes possess the power to suppress the peril of condensation accumulation.

When water pipes are subjected to varying temperatures, the insidious presence of condensation emerges, ushering in a host of problems such as mold and mildew. By enveloping the pipes in an insulating embrace, a protective shield is forged, thwarting the formation of condensation and safeguarding your plumbing system against potential harm. For those seeking a dependable and efficient solution for their underground plumbing needs, look no further than insulated PEX pipes.

Unrivaled in their capacity to combat temperature fluctuations, impervious to heat loss in wintry realms, and adept at mitigating the risk of condensation, these pipes emerge as the ultimate choice.

The Benefits and Types of PEX Pipes: Everything You Need to Know

  • PEX pipes are a type of flexible plumbing material that is commonly used in residential and commercial buildings.
  • One of the main benefits of using PEX pipes is their durability. They are resistant to corrosion and can withstand high temperatures and pressure.
  • There are three main types of PEX pipes: PEX-A, PEX-B, and PEX-C. Each type has its own advantages and can be used for different applications.

Considerations for Climate and Weather Conditions

Underground PEX pipes can face challenges due to extreme temperatures. Freezing in cold regions can result in bursts and costly repairs, while high temperatures in hot areas can cause leaks and bursts. To prevent these issues, insulation is essential in regulating temperature and preventing heat loss, condensation, corrosion, and mold growth.

To determine the right insulation materials and techniques for your specific climate, it is advisable to seek guidance from professionals. Regular maintenance is also crucial, especially in harsh weather conditions. Through timely inspections, potential problems can be identified early on, preventing them from escalating into larger issues.

By taking into account the climate, ensuring proper insulation, and conducting regular maintenance, you can confidently ensure the longevity and reliability of your underground PEX pipes, regardless of the weather challenges they may face.

can you bury pex underground

Can PEX Crimp Fittings Be Used Underground?

Delving into the realm of underground plumbing, an intriguing question arises: Can PEX crimp fittings withstand the subterranean challenges thrown their way? With bated breath, let us embark on a quest to uncover the truth, exploring their compatibility, durability, and both the enticing benefits and potential drawbacks for such clandestine applications. In the mysterious underworld where soil composition, drainage, and external elements hold sway, PEX crimp fittings often find themselves in harmonious coexistence.

However, tread carefully, for their longevity is contingent upon the careful consideration of these factors. Proper installation and vigilant protection are the pillars upon which their durability stands. Ah, the allure of easy installation!

PEX crimp fittings , with the deftness of a magician’s touch, can be securely fastened to their PEX pipe companions using a crimping tool. A connection forged in reliability and strength, it becomes clear why these fittings have captivated the hearts of homeowners. And let us not forget their cost-effectiveness, a siren’s call that beckons to frugal souls far and wide.

Yet, dear reader, heed my words of caution , for not all is perfect beneath the surface. Beware the lurking perils of tree roots and the tumultuous activities of construction. Such external forces can spell doom for these intrepid fittings, rendering them damaged and vulnerable .

Regular inspections, like guardians of the underworld, must be undertaken to detect any signs of weakness or leakage. In the grand tapestry of underground plumbing, the final thread we weave is one of contemplation. As we draw this tale to a close, remember this: while PEX crimp fittings may venture into the subterranean realm, the specific conditions and risks must be carefully appraised.

Seeking the guidance of a professional plumber, a sage in their craft, will ensure the path you tread leads to a reliable underground plumbing system, steadfast and true.

can you bury pex underground

Everything You Need to Know About Burying PEX Pipes Underground

  1. Understand the benefits of using PEX pipes.
  2. Familiarize yourself with the different types of PEX pipes: PEX-A, PEX-B, PEX-C.
  3. Consider the pros and cons of burying PEX pipes underground.
  4. Take precautions when burying PEX pipes, such as using insulated pipes and considering climate and weather conditions.

Can Sharkbite Fittings Be Used Underground?

In the world of plumbing, there is a game-changer that has captured the attention of professionals and DIY enthusiasts alike: Sharkbite fittings. These marvels of engineering have revolutionized the way we connect pipes, making installation a breeze. But what about using them underground with PEX pipes?

The allure of Sharkbite fittings lies in their effortless installation. No special tools or soldering required. Simply push them onto the pipe, and voila!

You have a secure connection. It’s a dream come true for anyone who has struggled with traditional crimp fittings. But here’s the catch.

While Sharkbite fittings are designed to withstand the elements, their durability and longevity might be called into question when buried underground. Over time, leaks or failures could become a reality, potentially causing headaches and costly repairs. So, before you make the decision to go down the Sharkbite path underground, it’s essential to weigh the convenience of installation against the potential risks.

Regular maintenance and inspections will be crucial to prevent any issues from cropping up. In conclusion, Sharkbite fittings offer a convenient option for connecting PEX pipes underground. However, it’s important to consider their durability , longevity, and potential drawbacks.

When in doubt, seeking the advice of a professional plumber can help you make an informed decision that will stand the test of time.

What Kind of PEX Should Be Used for Underground Installation?

Selecting the right PEX type for underground installation requires careful consideration of various factors. The soil composition and climate conditions in your area are crucial in determining the most suitable PEX type for your project. Examining the soil composition and drainage is essential.

Different types of soil can impact the lifespan of buried PEX pipes. Clay soil, for instance, can retain water and increase the risk of corrosion, while sandy soil may necessitate additional measures to prevent pipe movement. Climate conditions also play a significant role.

Extreme temperatures can affect the performance of underground PEX pipes. In colder regions, insulated PEX pipes are recommended to safeguard against temperature fluctuations and heat loss. Regular maintenance is crucial in areas with harsh weather conditions to ensure the longevity of buried pipes.

There are three primary options for PEX types: PEX-A, PEX-B, and PEX-C. PEX-A pipes are known for their exceptional flexibility and durability, making them perfect for underground installation. PEX-B pipes are more cost-effective and widely used. PEX-C pipes are rigid and suitable for commercial applications.

Each PEX type has its advantages and disadvantages when used for burial. PEX-A pipes are renowned for their resistance to freezing and durability . PEX-B pipes offer affordability but may not be as flexible as PEX-A.

PEX-C pipes are rigid and may not be suitable for areas with temperature fluctuations. To make an informed decision for your underground installation, take into account factors like soil composition, climate conditions, and the specific pros and cons of each PEX type. Seeking advice from a professional can assist you in making the best choice based on your unique circumstances.

can you bury pex underground

PEX, a flexible plumbing material, is commonly used in residential applications. But can you bury PEX underground? Find out how to protect PEX in this video.

YouTube video

Does Buried PEX Need to Be Insulated?

Deep within the earth, hidden from view, lies a network of PEX pipes . These pipes, vital for the functioning of our underground plumbing system, require a safeguard against the whims of nature. The key lies in proper insulation .

Without this crucial layer of protection, our underground PEX pipes are left vulnerable to the elements. Extreme weather conditions can wreak havoc, causing irreversible damage. In freezing temperatures, uninsulated pipes can freeze and burst, leading to costly repairs and water damage.

In scorching hot climates, the absence of insulation allows the pipes to absorb heat, compromising water quality and increasing the risk of corrosion. However, when we take the time to insulate our buried PEX pipes, a world of benefits unfolds. A consistent water temperature is maintained, preventing the formation of condensation and the growth of mold and mildew.

This simple act of insulation optimizes the performance and longevity of our underground plumbing system, ensuring its reliability for years to come. So let us not underestimate the power of insulation. It is the shield that safeguards our buried PEX pipes, protecting them from the ever-changing forces of nature.

If you’re wondering whether it’s safe to flush paper towels down the toilet, check out our article “Can I Flush Paper Towels?” to find out all the important information you need to know.

can you bury pex underground

1/2 Final Thoughts: Is Burying PEX Underground the Right Choice?

Before deciding to bury PEX pipes underground , there are crucial factors to take into account. Cost-effectiveness should be a top priority. While it does offer protection and easier maintenance, it may not be the most cost-effective option for everyone.

Another important consideration is the potential damage from tree roots. Take a careful look at the proximity of trees to the burial site and carefully weigh the risks involved. Seeking guidance from a professional is highly advisable.

They can thoroughly examine the conditions of your property and provide expert advice on whether burying PEX pipes is the right decision for you. Ultimately, make an informed choice by considering cost-effectiveness, potential risks, and expert guidance. Select the option that aligns best with your specific needs and circumstances.


In conclusion, burying PEX pipes underground can be a practical and efficient solution for various plumbing applications. We have explored the benefits of using PEX pipes, the different types available, and the considerations when burying them. By understanding the soil type, using insulated PEX pipes, and selecting the appropriate fittings, homeowners can ensure a successful underground installation.

While there are pros and cons to burying PEX pipes, taking the necessary precautions and following best practices can minimize potential issues. It is important to choose the right type of PEX and consider insulation for optimal performance. Overall, this article provides valuable insights for anyone considering burying PEX pipes underground.

For further information on related topics, we recommend exploring our other articles on PEX pipe installation, maintenance, and troubleshooting.


How long will PEX last underground?

PEX piping is known for its flexibility and durability, making it a reliable choice that can last for a minimum of 50 years. On the other hand, PVC/CPVC pipes are even more long-lasting, with an estimated lifespan of up to 100 years under normal conditions. It’s important to note that PVC pipes are commonly used for drainage purposes due to their susceptibility to damage from extreme heat.

Can PEX be direct buried?

PEX pipes are suitable for underground use, but it is important to note that they are not designed for outdoor use unless they are adequately insulated. To ensure proper installation, it is recommended to bury the PEX pipe at least 12 to 18 inches below the frost line. This depth will help protect the pipe from potential damage caused by freezing temperatures.

Can PEX be buried in concrete?

PEX pipe can indeed be installed under a concrete slab. It is a flexible type of pipe that comes in coils, making it easy to install in one continuous length without the need for additional fittings. This is particularly useful when installing PEX pipe under concrete slabs. In addition to being installed under the slab, PEX pipe can also be encased within the slab itself. This is a popular choice for radiant floor heating systems, where the PEX pipe is embedded in the concrete to efficiently distribute heat throughout the floor.

Can PEX be grounded?

To properly ground your home, you will need a #4 copper ground wire and a suitable clamp, which can be purchased from a building supply store. Connect the ground wire to the ground rod and ensure a secure connection. Additionally, connect the ground wire to your electric service box and any other areas of your home that require grounding. It is important to note that your PEX plumbing does not require grounding.

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