Can gas lines freeze?

One of the key features of many plumbing systems available today is the wide variety of fuel sources that can be used.

For example, when it comes to things like water heaters, many models often have different functions and efficiencies depending on said fuel source. Out of the range of options, the most common and effective tends to be gas-powered – often propane or natural gas. 

For the plumbing system to work properly, the gas needs to be brought into the main chamber through special lines. As with many systems, the gas is in one consistent state until it’s burned. 

However, with the weather getting colder near the end of the year, many homeowners start to ask themselves questions like, “can gas lines freeze?”. 

We’ve also answered a few other common questions, so read on to learn more. If you need help with servicing your home’s plumbing system or if you want to install a new one, contact our team at Diamondback Plumbing for quick, reliable help.

Is It Possible for Gas Lines to Freeze?

Ultimately, the answer to the question, “do gas lines freeze?” is centered around the type of gas itself and how it’s transported throughout your home. In many cases, propane and natural gas are stored and transported differently. 

Due to its chemical composition, natural gas is always transported to the home but can be in either a compressed or already cold liquid form. However, it is also important to note that even natural gas lines can freeze under very specific restrictions. 

Although frozen gas lines are very rare, they mostly occur when there are problems with the gas lines themselves. Thankfully, if your plumbing system was installed by a professional, the likelihood that your plumbing system’s natural gas line will freeze during the winter is slim.

In the chance that there is water inside a gas line, the only way it could have gotten in is during the installation process or through cracks. The pipes used to transport propane or natural gas from your home’s local supply to the system’s main units are tightly sealed for safety reasons. So, if you do find frozen gas lines in your home, the main cause is bad installation or leaking gas lines.

What Temperature Do Various Gases Freeze At?

The full answer to the question, “can gas lines freeze?” is, surprisingly, yes. Though it’s rather rare, gas can freeze under the right conditions. Of course, the temperature needs to be extremely low, (about -295 degrees Fahrenheit or about -182 degrees Celsius) for the gas to freeze. If your home uses propane instead of the typical natural gas option, that freezing point can be even lower at -306 degrees Fahrenheit or -188 degrees Celsius. 

Even a really cold winter day won’t make your pipes freeze!

Even if there is water in the pipes or the gas itself freezes somehow, the pipes used for your home’s main gas supply lines and other similar lines are incredibly sturdy. The materials put into the pipes are made to be resistant to most damage since its cargo has the potential to be quite dangerous. If you combine this with the fact that the pipes are highly pressured to keep the gas in a constant state, you’ll find that breaking the pipes is nearly impossible.

Why Do Natural Gas Lines Freeze During the Winter Months?

As mentioned before, water is the main factor that causes freezing in the gas lines in your home. In that case, the main cause for the freezing is the water itself, not the gas. However, there is a slimmer chance that can lead to natural gas lines freezing in less extreme temperatures.

Most of the time, your natural gas lines freeze due to water or even simple moisture getting trapped in or even around it. While the gas itself isn’t likely to freeze, the metal of the pipe often can and will. 

Typically, the answer to “can gas lines freeze in a house?” is a yes, but only when the lines are by damaged plumbing pipes, areas of trapped rainwater in or near your home’s foundation, or close to a clogged gutter – where water can often collect and freeze. 

At this point though, it’s always important to remember that natural gas isn’t what’s freezing. Even if your home is supplied with natural gas that’s specified to be liquid, the liquid itself is already quite cold and would need to drop even lower past -260 degrees Fahrenheit to freeze. While the pipe and tubing carrying the gas can freeze easily, the gas won’t. Naturally, even the coldest winter night in Arizona won’t freeze the gas.

What Causes Propane Lines to Freeze Up During Winter?

With all that we’ve mentioned above about the specific temperatures that the propane gas itself freezes at and how it’s typically any moisture around the pipes that freezes, the answer of whether or not gas lines freeze varies greatly. Depending on what exactly you refer to, the answer can be either a yes or a no.

Much like natural gas lines, propane – in both liquid and gas form – doesn’t freeze easily. While this makes the answer to the question, “can gas lines freeze?” a no due to the fact the gas in the line not freezing, the metal lines, the propane tank’s regulators, and other similar parts can. More often than not, this is what many homeowners find when their gas lines seem to freeze over in winter. 


Ultimately, the answer to whether gas lines freeze during the winter months is, yes, but it strongly depends on what you as a homeowner are concerned about. Typically, homeowners find that their home’s gas lines have a layer of ice on them and get concerned that the entire line is frozen. While the pipe holding the gas – and even any parts connected to them – do, in fact, freeze, the gas inside doesn’t. 

Propane and natural gas, the two most commonly used fuels for homes, have very low freezing points that even a cold winter night won’t freeze. So, while your lines ice over in the winter, the gas inside still flows just as well as it would any other time of the year!

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