What Pipe To Use For Natural Gas?

Steel, black iron, polyvinyl chloride (PVC), high-density polyethylene (HDPE), and copper are the most popular materials used to build gas piping. Some of these materials are prohibited by some utilities, so check with your local utility to see what is permitted in your region before installing any. If you employ a professional to complete the task, they will be familiar with the local regulations.

Flexible Corrugated Stainless Steel Tubing

Corrugated stainless steel tubing is flexible and easy to install, and it works well in compact spaces and areas with a high risk of natural disasters. Flexible corrugated stainless steel tubing can crack over time, despite its ability to reduce damage. This material should only be used for indoor gas piping.

Galvanized Steel

Galvanized steel gas pipes are both energy efficient and long-lasting. Galvanized steel pipes are suitable for water supply lines since they may be used for both interior and outside gas lines. Because it is labor-intensive compared to other materials, this material is commonly found in older homes and is not used in new structures nowadays.

Black Iron

The most frequent material used to manufacture gas pipes, both inside and outside, is black iron. The substance is durable, heat resistant, and can be molded into an airtight seal. Black iron, on the other hand, can corrode and its sealant erode over time. Consider contacting a professional for routine maintenance if your gas pipes are constructed of black iron.


Because PVC gas pipes are sturdy and corrosion-resistant, they’re ideal for underground outside gas lines. Although PVC pipes are a cost-effective option, some places do not allow them since they can break during installation.


HDPE pipes, like PVC pipes, are appropriate for buried outside lines. Although these plastic pipes are flexible and affordable, they can be damaged by subsurface material such as rocks and tree roots.


Some towns do not allow copper gas lines, therefore their use is limited. Copper pipes have severe code requirements that limit their use due to their estimated life of 20 years.

PVC Pipe

PVC pipes can be used for both natural gas and water lines. They are typically available in 10 foot and 20 foot lengths, with variable diameters. The sizes range from 1/2 inch to 6 inches, so you can pick one that fits your needs.

You’ll need solvent cement, primer, or a push-to-connect fitting to attach PVC pipes. However, you must remember not to put PVC pipes in areas where direct sunlight shines. PVC can be destroyed if it is exposed to hot water or direct sunshine. If you’re going to use it for natural gas, make sure it’s in a cool, dark area.

Black Pipe

A black pipe is a long-lasting solution for transporting natural gas. Steel and iron are the most common materials for these pipes. Because they are pliable, they are ideal for use in homes. Black pipes can be used to transport both natural and propane gas.

Please keep in mind that these pipes must be fitted by trained personnel. They will often come in lengths ranging from 2 inches to 10 feet, with a diameter ranging from 1/4 inch to 2 inches. Many people bring natural gas into their homes using a black pipe.


CSST pipes or stainless steel tubing will be an excellent option if you plan to install new gas appliances in your home. They’re corrugated, so they’re easy to bend around corners and edges. As a result, you won’t need to buy any new joints or fittings.

If you must pick between CSST and steel pipes, we recommend the former because it is lighter and easier to install. You can accomplish the job if you have some training. CSST pipes can also be used in situations when a long pipe is required.

When purchasing, make sure to check if they are certified by the producers.

Copper Pipe

Copper pipes have been used to transport hot and cold water for many years. The length of these tubes varies, but they are normally between 2 and 10 inches in diameter. Water and gas flow freely through each dimension of 1/2 to 1 inch.

If you use natural gas within the house, the thinnest pipes will suffice. The thicker ones, on the other hand, are required for gas service lines.

To create a huge pipeline, you’ll need to join smaller copper pipes together. Brazing, soldering, push-to-connect fittings, or a compression coupler can all be used to accomplish this. The line would remain intact if this was done. It will last a long time, making it a highly long-lasting choice.

Polyethylene Pipe

Then there’s the great possibility of transferring gas via subsurface pipelines. Polyethylene pipes are extremely durable and can transport both water and gas. These have a long-term resistance and are therefore very environmentally beneficial. As a result, they are employed for subsurface gas transportation because pipes cannot be dug up frequently for inspection.

These pipelines function in adverse weather conditions. They are not easily broken or dismantled. You won’t have to call for maintenance, which makes it a great option.

Additionally, solvent and priming can be used to connect pipes and other fittings together. There will be some initial digging required, and you will need to hire professionals to complete the task.

What size natural gas pipe do I require?

Section 1 requires 1/2 inch pipe to feed outlets A and B, or 35 cubic feet per hour. 3/4 inch pipe is required in Section 2 for feeding outputs A, B, and C, or 94 cubic feet per hour. Section 3 requires 1 inch pipe to feed outlets A, B, C, and D, or 230 cubic feet per hour.

Is it safe to use PVC pipe for natural gas?

For natural gas, they used to allow a yellow PVC pipe. It had to be totally buried in order to be used. They had special metal 90’s attached to the end, which would finish the section as it entered the ground. Plastic is, without a doubt, the most frequent supply line to meters nowadays, although not PVC.

For natural gas, what kind of black pipe is used?

“Galvanized pipe for gas” is a term you may be familiar with.

Simply put, black iron pipe is the same as zinc-coated iron pipe, but without the zinc coating.

The zinc coating on galvanized gas pipe is designed to preserve the pipe from corroding due to moisture contact.

While it accomplishes its function admirably, it does deteriorate with time.

If exposed to water, black iron pipe will corrode quickly because it lacks the zinc covering.

As a result, it is not suitable for water or waste pipes.

However, it is often used for gas piping.

One reason for this is because it is less expensive than galvanized gas pipe.

Another advantage is that when crawling about under a house, it is easy to distinguish it from water piping.

Is it safe to use copper pipe for gas?

Many households in the northern half of the country will have to turn on their heating systems at the beginning of October. Natural gas is one of the most cost-effective and efficient fuels for a furnace or boiler. With its benefits come questions about safety and obligations for homeowners. It is your role as a home inspector to assist in the detection of flaws that may jeopardize the safety of residents in natural gas-powered homes. We’ll go through some of the fundamentals of gas piping inspection.

The gas supply line, also known as the building line, is the plumbing that runs throughout the house. Individual appliances are served by branch lines. The branch line finishes in a drop line, which is a vertical pipe that drops down from an overhead branch line to the appliance. If it carries gas up to an appliance from a branch line below the appliance, it’s called a riser.

A sediment trap or dirt pocket, commonly referred to as a drip leg, is normally present at the appliance connection point and consists of a nipple and a cap. This pipe extension, which is normally at least 3 inches long, is designed to catch any water or foreign material that may be present in the gas before it enters the appliance. The solids and liquids fall into the pocket, which is just a gravity mechanism.

The homeowner is normally responsible for the pipework downstream of the gas meter. The gas company is normally responsible for the piping upstream of the gas meter, as well as the meter itself.

Steel, copper, and brass are the most popular materials for gas piping. In some cases, galvanized steel, copper, brass, or CSST (Corrugated Stainless Steel Tubing) can be used, but copper is prohibited by some utilities. Copper is widely used in different parts of the world. You should be aware of what is considered acceptable in your neighborhood. Black steel piping with malleable iron or steel fittings is common. In other cases, galvanized steel is also used.

Flexible connectors are allowed to be used to connect appliances to gas pipelines. A shut-off valve must be installed at the rigid piping connection. This valve must be located in the same area as the appliance.

Accessible and three or six feet long: The flexible connectors cannot pass through walls, floors, or ceilings, and they cannot be hidden. Except for gas stoves and laundry dryers, the flexible connector length is normally limited to 3 feet. 6 feet is usually allowed for these equipment. Using nipples to splice or join connectors is frequently forbidden. Flexible connectors are only allowed in some jurisdictions for gas stoves, dryers, outdoor barbecues, and other semi-portable equipment. Flexible connectors may be prohibited on gas furnaces, water heaters, space heaters, and other similar appliances. Flexible connectors are more likely to be utilized on all appliances in earthquake-prone areas because they give some protection against gas piping leakage or rupture during an earthquake. To find out what is and isn’t permitted in your area, consult your local gas code.

The use of white thread seal tape (often referred to as Teflon tape) as a connecting compound for steel gas piping is not recommended. Cutting oils on the pipe threads from the manufacturing process may hinder the tape from sealing. Yellow thread seal tape is permitted in some regions. Pipe dope is favored and may be the only option available. You might wish to double-check with the gas company. Inquire about whether any piping installations with thread seal tape of any color should be reported as a defect.

Although certain exceptions exist, most appliances should have a shut-off valve nearby.

The use of gas piping as a grounding mechanism for the electrical service is prohibited by most authorities. In many countries, however, bonding the gas piping to the electrical grounding system is required. This is often accomplished by connecting the gas pipe to the supply water piping (assuming it is grounded) near the water heater. We want to keep the gas piping at zero electrical potential by attaching it to the grounding system to prevent an electrical potential building within it that could lead to arcing, which could ignite gas.

All of these issues have the potential to result in gas leaks and explosions.

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Is it possible to utilize PEX pipe for gas?

PEX pipe is not the same as PE piping, and the two are frequently confused. Polyethylene, or PE, is a flexible plastic polymer that is ideal for piping in wells and other cold-water supply lines.

PEX stands for polyethylene that has been cross-linked. It’s made of polyethylene, a material with a stronger link between the polymer chains that make it up. PEX is now suited for both hot and cold water applications as a result of this advancement. It can also be utilized in some gas applications, depending on the building code.

PEX and PE are more flexible and have a significantly greater pressure rating than typical gas lines, thus they suit those requirements. They are, however, made of a soft material that could be damaged by nails, rodents, and other objects. As a result, in your location, either may not be permitted for use as a residential gas line. Even when the utility provider is able to install it, plumbers and homeowners are not always able to.

Why are gas lines made of black pipe?

Pipes are needed to supply water and gas to houses and businesses. Stoves, water heaters, furnaces, and other appliances run on gas. Water is both necessary and obvious. Black pipe and galvanized pipe are the two most prevalent types of steel pipe used to transport water and gas. Homeowners and even some professionals are often perplexed as to where and when to use these steel pipes.

Galvanized steel pipe has a zinc coating applied to it to make it more corrosion resistant. Galvanized pipe is mostly used to bring water to homes and structures. The zinc also helps to prevent mineral deposits from clogging the water line.

Because it is uncoated, black steel pipe differs from galvanized pipe. The black color is due to the iron oxide that formed on the surface during production. Black steel pipe’s principal function is to transport natural gas into homes and businesses. The pipe has no seams, making it a stronger and safer pipe for transporting gas. Because black steel pipe is more fire resistant than galvanized pipe, it is also utilized for fire sprinkler systems.

Because of the galvanized coating, you should not use galvanized pipe for gas. Galvanized steel bits will flake off over time and block your gas regulators and burner units.

If you mix galvanized and black iron, corrosion will be accelerated where they come into contact.

How far can a 1/2 gas line for a barbecue be run?

If you’re anticipating future yard expansion, it’s always a good idea to design for a 1 1/2″ gas line. You won’t be sorry. If you’re taping off a common area or running the line off your house, you’ll need a less than 30 foot run and a 1/2″ gas line at the very least.

Is it possible to run a gas line through plastic?

Utility companies have been distributing natural gas from transmission lines and terminals to customers for decades using plastic tubing buried in the ground. Because it does not corrode and does not require anticorrosion protection, this material is more durable than steel or copper. It may be found as easy as metallic pipe when buried with a tracer wire. Because plastic does not operate well under these pressures, high-pressure natural gas transmission lines are still made of steel (greater than 500 psi).

Is it possible to run gas through a plastic pipe?

Plastic gas pipe cannot be used domestically under any circumstances since it will melt in the event of a fire, which might be disastrous. Tracpipe, as previously noted, is a viable option, but your Gas Safe installer will be able to advise you.