How To Install Natural Gas Line Under Concrete Slab

How To Install Natural Gas Line Under Concrete Slab
  • Author: Amanda Arnold
  • Posted On: October 5, 2022
  • Updated On: August 21, 2023

You must install a natural gas line under your concrete slab if you intend to add one to your house. Typically, a gas pipe is buried directly beneath a house using trenching. When installing the pipe, it’s essential to keep a few things in mind, like choosing a corrosion-resistant wrapping material and ensuring the burial depth is at least 18 inches.

Gas is a substance that can only be smelled and cannot be seen. The gas line must always be accessible for inspection to assess any damage. Concrete makes it more challenging to access stuff. Depending on the circumstances, this could either be advantageous or disadvantageous.

Concrete being laid on top of gas lines has no benefits and can result in many issues. The workers will have to break concrete to get to stuff underneath. Such force could harm the items the workers wish to obtain as well.

Steps For Installation Of Natural Gas Line Under Concrete Slab

The two substances are immobile as long as the pipe protrudes through the concrete. This appears like a challenging task, but with some preparation and the proper equipment, it’s relatively simple:

  • You must find the gas pipe that enters your house. This is typically found in your utility room or close to the street. Once the gas line has been found, you must dig a trench from it to the location of your appliances.
  • A PVC pipe must be laid in the trench. Ensure that the pipe is level, then fasten clamps every several feet.
  • A flexible gas line must be attached to the PVC pipe.
  • Your appliances must be connected to the gas line.
  • After everything is connected, you must check for leaks.
  • You can turn on the gas and use your new appliances once you’re sure there are no leaks. A gas line about 4 feet long must be built to link the island to the grid.
  • In this instance, just cut a passage through the cement using a circular saw and a blade designed to cut through cement.
  • The only way to identify a leak on a hardwood floor is to raise some of the surfaces so you can see it. Make a two-inch-deep gap in the concrete floor if it has been poured.

Using a chisel, you must cut several grooves together to extract the fragments. After cutting the slot, there will probably be a crack somewhere beyond the end.

Depth Of A Gas Line Should Be Under A Slab

The type of gas being utilized, the size of the pipe, the climate, and the soil properties are just a few of the variables that affect how deep a gas line under a slab should be. A gas pipe should typically be buried at least 19 inches underground.

All gas piping currently installed or installed on the ground beneath a building or other structure must be sleeved or installed in a gastight conduit, and all exposed gas piping must be at least 5 inches above grade or the establishment or different construction.

Rerouting The Gas Line In Concrete

Rerouting the gas pipe is the most excellent solution to this problem. Any home improvement project has a genuine potential to result in a gas line installation. You will almost likely receive a demolition notice from a building official or a team from the gas line regulators if they find a structure you built too close to your gas line.

When working with gas lines and electrical lines, be sure to consult experts whenever feasible. Employing a professional to make repairs to your house will cost you much less than having to build it from scratch after it has burned down.

Can You Bury Gas Line Under Concrete?

The home’s exterior pipe should be securely supported and shielded from mechanical failure, whether it is located underground or above ground. Unless otherwise stated, burying underground piping 18 inches below the ground’s surface should be sufficient.

Which Is Better For Gas Piping?

Several materials can be utilized to assemble a gas line. The most widely used materials for gas piping are steel and copper. Some applications allow for corrugated stainless steel tubing and brass tubing. On the other hand, some utilities may or may not allow copper. Other nations have made extensive use of copper.

It is important to note that code requires sleeved lines when a gas line runs beneath a concrete slab. Consequently, the pipe needs to be protected from harming the concrete, and the sleeve requires to be put in to prevent this from happening.

How Far Underground Should A Gas Line Be?

Service lines are typically only 18 inches deep, while most gas lines are usually buried at least 24 inches deep. Trenching techniques to protect the utilities must be employed when digging trenches for utilities.

If required, a trench for a gas line can be inserted into a sleeve. Use a trenching technique to keep the utilities safe if you need to dig for utilities.

Security Measures

Awareness of any risks associated with running a gas line through a house is crucial. Deciding to install gas piping beneath your flooring or in other parts of your property might be risky, so think it through carefully.

Before placing gas piping beneath floors or other places around your home, you must consider the hazards and effects. Consult an expert about the installation before making any decisions since poor installation might have significant safety implications.


Safety comes first at all times when it comes to gas lines. When performing any construction interventions with gas lines, ensure you hire experts and have the required licenses. Pouring concrete might seem like a brilliant idea because it almost completely blocks access to gas lines, but if something goes wrong, it will just worsen matters.

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Author: Amanda Arnold

Amanda has been working with ConstructionHow since 2021. Her experience spans over 5 years in the creative niche such as home decor and trends, landscaping, renovations, and custom architectural values. As a home designer expert, she has a keen eye for the latest home improvement trends with accurate facts that readers find impossible to ignore. Being invested in home-building trends is how she has gained her lucrative expertise exploring more to bring a positive ambiance for all homeowners (and even tenants!). Currently, she lives in a beautiful beach home, a source of fascination for her.