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Types of Gas Lines

Before installing a gas line, it is important to check local building codes to ensure that your new gas line will be compliant. Codes can vary greatly by jurisdiction. Also, while some lines can be installed both inside and outside of the homes, others can only be installed outside the home and underground.

Type of Gas Lines to Consider:

- Corrugated Stainless Steel Tubing (CSST)
- Polyvinyl Chloride (PVC) and Polyethylene
- Galvanized Steel or Black Iron
- Copper Pipes

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1. Corrugated Stainless Steel Tubing (CSST)

The Good:

- Affordable
- Flexible
- Easy to install

The Bad:

- Potential fire hazard due to lightning
- Can puncture

Everything Else:

Corrugated Stainless Steel Tubing is a popular choice for its affordability and flexibility. These tubes are easy to spot, as they are typically covered in a yellow plastic or vinyl coating that provides additional durability. They can be used for interior and exterior lines. CSST is lightweight and can easily navigate obstacles in your home that metal pipes cannot. CSST is relatively inexpensive and takes less time and skill to install than steel or copper. Although CSST has been installed in millions of homes since its approval in the 1990s, there are some concerns about the safety of this tubing and its connection to lightning-related fires. It must be properly bonded according to the manufacturer's instructions to prevent accidents.

2. Polyvinyl Chloride (PVC) and Polyethylene

The Good:

- Affordable
- Durable

The Bad:

- Only used for exterior, underground lines

Everything Else:

Although these pipes are durable and hold up well in different climates, they can only be used for exterior, underground gas lines. They are relatively inexpensive and easy to install. Typically, a trace wire will need to be buried with these plastic tubes so that the gas line can be located from above the ground. All plastic pipes must be converted to metal (either copper or steel) before coming above ground.

3. Galvanized Steel or Black Iron

The Good:

- Durable
- Safe

The Bad:

- High labor cost to install
- Rigid, cannot navigate obstacles like flexible options

Everything Else:

Black iron pipes have been used for decades to install interior gas lines to appliances and fireplaces. They are strong and minor impacts by a nail or tool will not cause much damage. The installation is time consuming and requires heavy equipment. The pipes cannot navigate obstacles like CSST and require lots of joints that increase the risk of leaks.

4. Copper Pipes

The Good:

- Durable
- Have been used for generations
- Safe


- Lack flexibility
- possibility of flaking

Everything Else:

Copper pipes are very popular in certain regions. They are often less flexible than corrugated stainless steel tubing (CSST) and take longer to install; however, these pipes are durable and safe. In areas with a higher sulfur concentration, copper is not recommended as the sulfur may cause flaking.

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About the Author

ProMatcher Staff, ProMatcher
Orlando, FL 32803

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