Can you bury PEX in the ground? (2024)

Can you bury PEX in the ground?

Yes, and PEX pipe can be buried underground. However, it's important to follow local building codes and guidelines to ensure compliance and the longevity of your plumbing system.

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Can you bury PEX directly in the ground?

A PEX pipe will hold up well underground. However, it's not rated for use outdoors unless it's properly insulated. If using a PEX pipe underground, bury it at least 12 to 18 inches below the frost line. The temperature is warmer just a few feet below the surface.

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How long will PEX last underground?

PEX: Due to its flexibility and durability, PEX piping should last at least 50 years. PVC / CPVC: Under typical conditions, these pipes should last up to 100 years. Keep in mind that PVC pipes are often used for drainage because extreme heat can damage them.

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Can you ground PEX?

You'll need to run a Grounding Electrode Conductor to at least one 8' X 1/2” minimum ground rod and a Grounding Electrode Conductor to the metallic water service within 5 feet of it entering the house. If the water service to the home is non-metallic you will instead need an ufer ground.

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What kind of PEX is used for underground?

All types of PEX piping could be installed underground, nonetheless, it's better for you to research which type will last longer in this condition. As a general rule, PEX B can withstand freezing temperatures for a longer time than PEX A due to its high bursting pressure. However, it is less flexible than PEX A.

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Does PEX need to be sleeved underground?

You'd install PEX without sheath inside the slab for underfloor heating only. Otherwise it should be sheathed to allow it to comfortably expand depending on temperature variations, it also makes it possible to change the pipe if it bursts due to freezing, or bad quality pipe for example.

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What is the best water line for underground?

PVC (polyvinyl chloride) is a durable plastic pipe that is highly resistant to corrosion and impact damage. The material doesn't melt easily, which works well for underground water lines. PVC pipes also come in different diameters, so it is easy to find the right size for both residential and commercial applications.

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Where should you not use PEX?

Pex piping should not be used in high-temperature applications or in places where it will be exposed to direct sunlight for extended periods of time. Doing so can cause the material to degrade and potentially lead to leaks. It is also not advised to use pex piping for outdoor plumbing without proper protection.

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How do you keep PEX from freezing underground?

Ways to Keep PEX Pipe From Freezing
  1. Keep the room temperature above 55 F.
  2. Add insulation to particularly cold places such as attics, garages and basements.
  3. Drip faucets to keep water moving in the pipes.
  4. Shut off the water to outside hose bibbs (spigots) & drain the pipes.
  5. Install frost-free sillcocks.

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Can you bury PEX in cement?

Yes, PEX pipe can be installed under a concrete slab. Since PEX pipe is supplied in coils, installation can be completed in one continuous length without the need for extra fittings. PEX pipe can also be encased within a slab, which is commonly used for radiant floor heating.

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Is there a lawsuit against PEX?

A number of manufacturers, including Uponor, Viega, Nibco and Zurn, have already been sued over their PEX piping products. While some of these cases have settled or are still moving forward, attorneys are turning their attention to other brands to determine whether failure of the PEX tubing is an industry-wide problem.

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Is PEX A or PEX B better?

Bottom line, PEX A is more resistant to burst pressure than PEX B. PEX A's expansive material can handle up to 500 PSI, which makes it reliable in extremely cold temperatures. Since PEX B is a more rigid material, it will not hold up as well in similar situations.

Can you bury PEX in the ground? (2024)
Is it OK to bury PEX in gravel?

PEX tubing is approved for direct burial outdoors, a practice most often necessary when running a water supply line to a house. PEX, since it can expand, resists freezing more effectively than rigid pipe, but PEX can still burst if water freezes in a line.

Can SharkBite PEX be used underground?

The answer is yes. All SharkBite fittings are tested and approved for underground use. Different SharkBite fittings need extra preparation for direct burial though.

Is PEX good for outdoor use?

PEX pipe is not approved for outdoor applications and is not approved for continuous UV exposure. PEX pipe should not be stored in direct sunlight.

Is PEX or PVC better for underground water lines?

PEX pipes can last as long as 50 years. PVC (when kept in the correct conditions) can last for 70 years. However, CPVC (which is copper lined and therefore more durable than PVC) will need to be replaced every 20 years. This means that cheap PVC lasts the longest, but durable PEX lasts longer than the strongest PVC.

What is the best pipe for direct burial?

High-density polyethylene (HDPE) pipe is a good choice for underground water lines because of how the pipe is connected. Rather than using joints, which can leak, or glues and cement, which can degrade over time, HDPE pipe is connected via plastic fusion.

How deep should a water line be buried underground?

Exterior piping may be either buried or installed aboveground and shall be well supported and protected against mechanical damage. Underground piping shall be buried not less than 18 inches below the surface of the ground unless otherwise protected.

How deep to bury PEX?

Eighteen to 24 inches is fine in most cases. Go deeper if PerformaFlex XT is going to be driven over. If buried three feet or more XT does not need to be ran through another larger PVC unless the traffic will be very heavy.

Why stop using PEX?

Diminished Water Quality

One of the biggest reasons to avoid PEX piping is because of its effect on your drinking water. PEX piping can alter the taste and smell of the water in your home. Your water quality may worsen to the point where you need to replace all of your piping.

Will PEX burst if it freezes?

The truth is, as with any piping, PEX is still vulnerable to freezing if the temperature drops low enough. But thanks to its flexible material, the plastic expands under the pressure of the freeze, significantly reducing the chance of bursting. That means your house is unlikely to flood due to a burst PEX pipe.

What temperature will PEX freeze and burst?

In general, PEX would freeze when surrounding temperatures reach 20 degrees Fahrenheit—especially if the water line is uninsulated.

Will PEX pipe freeze underground?

If the weather gets cold enough, PEX pipes can and will freeze like any plumbing. However, PEX may be less likely to rupture as a result of freezing. When PEX tubing undergoes temperature changes — whether hot or cold — its first response is to expand. In some cases, this can be up to three times the tubing's diameter.

Is PEX tubing rated for direct burial?

Yes, PEX pipes can be buried underground.

What is the best pipe to use for underground water line?

What is the best pipe to use for an underground water line? You can use both PVC and PEX pipes for an underground water line. Both are able to be buried and can withstand high pressure. They are also resistant to rusting and corrosion.


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