Mastering Direct Bury PEX: Your Ultimate Guide to PEX Tubing Uses

Welcome to our article on direct bury PEX tubing! If you’re a homeowner or contractor looking for a durable and versatile option for underground plumbing, this article is for you. We’ll explore the benefits of using direct bury PEX tubing, the types suitable for direct bury PEX, guidelines for burying direct bury PEX tubing, and even address common questions about its use.

Whether you’re planning a new construction project or need to replace existing underground pipes, understanding the ins and outs of direct bury PEX is crucial. Did you know that direct bury PEX tubing is resistant to corrosion, freeze damage, and can withstand high temperatures? Now, let’s dive into the details and discover why direct bury PEX tubing is a fantastic choice for your underground plumbing needs.

Step into a world where plumbing is revolutionized, where durability and versatility reign supreme. Enter the realm of PEX tubing, a flexible plastic material that will forever change the way you view plumbing systems. With its resistance to corrosion and scale buildup, PEX tubing ensures longevity, while its ease of installation and minimal fittings required make it a dream for plumbers and homeowners alike.

Say goodbye to the limitations of outdated materials and embrace the future of plumbing with PEX tubing . Whether it’s hot or cold water distribution, or even freezing temperatures, PEX tubing stands strong, ready to fulfill all your plumbing needs.

The most important facts in a nutshell

  • PEX tubing is a type of flexible plumbing material that is used for various applications.
  • There are different types of PEX tubing suitable for direct burial, including PEX-A, PEX-B, and PEX-C.
  • PEX fittings can be buried, with options like PEX crimp fittings and Sharkbite fittings available.
  • PEX tubing has advantages over PVC for underground use, such as flexibility and resistance to freezing.
  • PVC also has advantages, like better resistance to UV rays and higher pressure ratings.
  • PEX tubing can be buried in concrete, providing it is protected from damage.
  • Common questions about direct bury PEX include concerns about bursting or freezing.
  • PEX pipes can be used outdoors, but precautions should be taken to protect them from UV exposure and physical damage.
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Benefits of Using PEX Tubing

PEX tubing, the favored option for plumbing, provides numerous benefits. Its resistance to freezing and bursting in cold weather ensures reliability, even during harsh winters. The flexibility of PEX tubing makes installation a breeze, minimizing the chances of leaks.

Its durability and longevity are attributed to the high-quality plastic material, which prevents corrosion and scale buildup. Whether for hot or cold water distribution, PEX tubing is the dependable choice. Little wonder that homeowners and plumbing professionals alike prefer it.

If you’re wondering whether it’s safe to bury PEX pipes underground, check out our article “Can You Bury PEX Underground?” to find out all the important details.


PEX-A tubing, the ultimate flexible star, effortlessly bends and stretches like a gymnast in the world of plumbing. Its strength knows no bounds, expanding without breaking even in freezing temperatures. With its resistance to chlorine and chemicals, it becomes a dependable choice for areas with water quality issues.

Whether it’s a residential or commercial plumbing project, rely on PEX-A tubing’s exceptional properties to keep your system intact.

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When it comes to residential plumbing, PEX-B tubing is the go-to option for homeowners and contractors alike. With its affordable price tag and excellent performance, it’s no wonder why it’s a popular choice. While it may not be as flexible as PEX-A tubing, its rigidity is perfect for installations that don’t require a lot of bending.

Plus, it’s strong , stable , and can withstand the demands of residential plumbing systems for years to come. One of the main reasons why people choose PEX-B tubing is its cost-effectiveness. It’s a budget-friendly option that doesn’t compromise on quality.

Additionally, it offers resistance to corrosion and scale buildup, ensuring that your plumbing system stays in top shape. Whether you’re renovating your current home or building a new one, PEX-B tubing is the ideal choice for your plumbing needs. Its affordability, rigidity, and durability make it a reliable and cost-effective solution that you can count on.

All You Need to Know About Direct Bury PEX Tubing and Fittings

  • PEX tubing is a flexible plastic piping material that is commonly used for plumbing applications.
  • PEX stands for cross-linked polyethylene, which means the material has been chemically treated to increase its strength and durability.
  • One of the main benefits of using PEX tubing is its resistance to freezing and bursting, making it ideal for direct burial applications.
  • There are three main types of PEX tubing: PEX-A, PEX-B, and PEX-C. Each type has its own advantages and is suitable for direct burial.
  • When burying PEX tubing, it is important to bury it at the correct depth to protect it from damage. The recommended depth is typically 12-18 inches below the surface.
  • It is also important to take precautions when burying PEX tubing, such as using a protective sleeve or wrapping the tubing in insulation to prevent damage from rocks or sharp objects.
  • PEX fittings, such as PEX crimp fittings and Sharkbite fittings, can also be buried underground. These fittings are designed to be durable and resistant to corrosion.


In the realm of commercial plumbing systems, PEX-C tubing reigns supreme as a versatile and economical choice. With its unique blend of flexibility and rigidity, this tubing proves itself worthy of various applications. Not only is it affordable, but it also boasts durability and an innate resistance to corrosion and scale buildup.

From expansive office buildings to bustling retail spaces, PEX-C tubing stands as a steadfast and efficient plumbing solution. It comes as no surprise that this reliable and budget-friendly option remains a top pick for businesses worldwide.

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

How Deep to Bury PEX Tubing?

Depth is a crucial factor when burying PEX tubing. It’s typically recommended to bury it 18 to 24 inches deep to shield it from freezing temperatures and other potential risks. However, there are other elements that should be taken into account.

The climate and type of soil in your area can influence the burial depth. In colder regions, burying the tubing deeper helps prevent freezing. Sandy or loamy soils allow for a slightly shallower burial, while clay or dense soils may require a deeper burial.

To provide additional protection for the PEX tubing, insulation is highly recommended. This helps safeguard it from any damage caused by shifting soil or temperature fluctuations. Insulation sleeves or wraps can offer an extra layer of security.

By carefully considering these factors and taking the necessary precautions, you can ensure that your buried PEX tubing remains in excellent condition, ensuring reliable plumbing for your needs.

direct bury pex

Direct bury PEX is a popular choice for installing water lines. In this video, we will learn how to properly install PEX water lines using the direct bury method. Find out the step-by-step process and best practices for a successful installation. Let’s get started!

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Precautions When Burying PEX Tubing

Proper precautions are essential when burying PEX tubing. Ensuring proper insulation is a must to protect against extreme temperatures and minimize risks. Avoid sharp bends or kinks to maintain water flow and prevent leaks.

Regularly inspect the tubing for damage and address any issues promptly. Following these precautions will ensure long-lasting and reliable water distribution.

PEX Crimp Fittings

A Reliable and Affordable Solution: PEX Crimp Fittings for Your Plumbing Projects When it comes to your plumbing projects, PEX crimp fittings are the go-to choice. Known for their reliability and affordability, these fittings are easy to install and offer a secure connection for your PEX tubing. Affordability is a major advantage of PEX crimp fittings.

They are cost-effective compared to other types of fittings, making them a budget-friendly option for your plumbing needs. Plus, installation is a breeze with just a crimping tool and rings required for a strong connection. Proper installation is key when using PEX crimp fittings.

It’s crucial to cut the tubing cleanly and squarely before inserting it into the fitting. By applying even pressure with a crimping tool, you can ensure a tight seal that minimizes the risk of leaks. However, like any fitting, PEX crimp fittings have their drawbacks.

Improper crimping can lead to leaks, so it’s important to regularly inspect the connections for any signs of leakage. This way, you can address any issues promptly. If you encounter any problems, troubleshooting tips are available for PEX crimp fittings.

For instance, if you detect a leak, you can try re-crimping the fitting or replacing the ring to achieve a proper seal. In conclusion, PEX crimp fittings offer a reliable and cost-effective solution for your plumbing needs. By following proper installation techniques and conducting regular maintenance, you can enjoy the benefits of these fittings for years to come.

Sharkbite Fittings

Revolutionary Solution: Sharkbite Fittings for Direct Bury PEX Step into the future of direct bury PEX installations with Sharkbite fittings. This innovative solution brings convenience and efficiency to the table, redefining the way we approach plumbing projects. Gone are the days of tedious soldering and crimping.

Sharkbite fittings introduce a push-to-connect mechanism, making installation a breeze. No specialized tools or training required – simply push the fitting onto the PEX tubing, and you’re good to go. It’s that easy.

Of course, like any solution, Sharkbite fittings have their limitations. They are best suited for temporary or semi-permanent installations, as their long-term durability may be a concern. Additionally, their convenience comes at a price, as they can be more expensive than traditional fittings .

But for projects where ease and speed are top priorities, Sharkbite fittings are a game-changer. To ensure a secure connection, proper installation techniques are crucial. Cleanly cut the tubing and apply a small amount of lubricant before connecting the fittings.

And don’t forget to regularly inspect for leaks to nip potential problems in the bud. In conclusion, Sharkbite fittings offer a revolutionary option for direct bury PEX installations . While they may have their drawbacks, their simplicity and efficiency make them a go-to choice for many projects.

By following the right techniques and addressing any issues, Sharkbite fittings can provide a reliable solution for all your direct bury PEX needs. Embark on a plumbing journey like no other, and embrace the future with Sharkbite fittings.

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Did you know that PEX tubing has been used in plumbing systems for over 40 years? It was first introduced in Europe in the 1960s and later gained 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.


Advantages of PEX Tubing

With its resistance to corrosion, ability to expand, and longer lifespan, PEX tubing stands as a steadfast and dependable option for all plumbing projects, be it residential or commercial. Unlike metal pipes, PEX tubing remains impervious to the ravages of time, warding off corrosion and scale buildup that can plague its counterparts. Its flexibility allows it to stretch and grow, accommodating the needs of installation with ease and efficiency.

Moreover, PEX tubing boasts a remarkable durability, standing strong against the rigors of daily use for years on end. Say goodbye to frequent repairs and replacements, as PEX tubing presents a lasting solution that surpasses expectations.

Advantages of PVC

In the realm of underground plumbing , there exists a remarkable contender known as PVC, short for polyvinyl chloride. This formidable choice has garnered favor among both homeowners and contractors alike due to its affordability. With an inherent resistance to corrosion and chemical damage, PVC pipes stand strong against the harsh elements that lurk beneath the surface.

Their durability ensures a prolonged lifespan, making them a steadfast and dependable solution for all your underground plumbing needs.

direct bury pex

The Essential Guide to Direct Burying PEX Tubing

  1. Understand the different types of PEX tubing available for direct burial: PEX-A, PEX-B, and PEX-C.
  2. Determine the suitable depth for burying PEX tubing based on local building codes and guidelines.
  3. Take necessary precautions when burying PEX tubing, such as avoiding sharp objects and rocks that could damage the tubing.
  4. Choose the appropriate fittings for connecting PEX tubing, such as PEX crimp fittings or Sharkbite fittings.

1/3 Can PEX Tubing Be Buried in Concrete?

Ensuring a dependable plumbing system for the future, burying PEX tubing in concrete requires proper insulation and installation techniques. To shield the tubing from the unforgiving concrete environment, it is essential to use insulation like foam sleeves or wraps . The concrete not only offers extra protection but also provides stability and support .

It is crucial to follow proper installation techniques and adhere to local building codes for safety and compliance. In conclusion, burying PEX tubing in concrete guarantees a durable plumbing system that will stand the test of time.

2/3 Connecting PEX to PVC Underground

Creating a reliable and secure connection between PEX and PVC underground requires the use of a transition fitting. These fittings, when installed properly according to the manufacturer’s instructions, ensure a leak-free connection. It is important to adhere to local building codes to ensure compliance with specific guidelines and regulations.

By carefully following these steps and utilizing a transition fitting, you can establish a connection that not only meets safety standards but also provides peace of mind.

If you’re considering installing a saddle valve on a PEX pipe, check out our article on how to properly install a saddle valve on PEX for step-by-step instructions and helpful tips.

Tabelle: Recommended Minimum Depth, Maximum Allowable Length, and Potential Applications of PEX Tubing Sizes

PEX Tubing Size Recommended Minimum Depth (inches) Maximum Allowable Length without Additional Support or Protection (feet) Potential Applications
1/2″ 12 300 Residential water supply, small-scale irrigation systems
3/4″ 18 500 Residential water supply, radiant heating systems, medium-scale irrigation
1″ 24 600 Residential water supply, radiant heating systems, large-scale irrigation
1-1/4″ 30 700 Commercial water supply, radiant heating systems, large-scale irrigation
1-1/2″ 36 800 Commercial water supply, radiant heating systems, large-scale irrigation
2″ 48 1000 Commercial water supply, radiant heating systems, large-scale irrigation

Do PEX Pipes Burst or Freeze?

In the realm of plumbing, PEX pipes reign supreme. Their robustness and versatility have led them to become a favored option for many. Yet, even the mighty can face their share of challenges.

Bursting and freezing are among the perils that haunt these pipes. The culprits? The bitter bite of frost and haphazard installation.

Fear not, for there are remedies to this plight. Proper insulation and precise installation are the keys to salvation. Beware the signs of impending doom: the whispers of unusual sounds, the tears of leaks, the dwindling dance of water flow, and the erratic pulse of water pressure.

Stay vigilant, take precautionary measures, and you shall have a plumbing system that remains steadfast and true.

direct bury pex

Can PEX Be Used Outdoors?

To ensure the durability of PEX tubing when used outdoors, it is crucial to address its vulnerability to UV radiation. Continuous exposure to sunlight can cause damage to PEX over time, necessitating protective measures. There are multiple approaches to safeguarding PEX tubing: opting for outdoor-specific PEX tubing that incorporates UV protection, shielding the tubing with insulation or a protective sleeve, or burying it underground.

Additionally, it is important to be mindful of potential challenges, such as extreme temperature fluctuations that can impact PEX performance. By taking preventative measures like insulation and meticulous installation, you can effectively avert any complications. In conclusion, through careful consideration and precautionary measures, you can ensure that your outdoor PEX installations remain resilient and efficient.


In conclusion, understanding the uses and guidelines for direct bury PEX tubing is crucial for anyone looking to install an efficient and durable underground piping system. This article has provided a comprehensive overview of PEX tubing, its benefits, types suitable for burial, and precautions to consider. We have also explored the comparison between PEX and PVC for underground use, as well as the possibility of burying PEX in concrete and connecting it to PVC.

By addressing common questions and concerns , we have aimed to provide valuable information to our readers. For further guidance on related topics, we recommend exploring our other articles on plumbing and construction projects.

If you’re considering installing PEX pipe underground, you should definitely check out our article “PEX Pipe Underground” for all the information you need to make an informed decision.

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