How To Purge Air From Propane Gas Line

How To Purge Air From Propane Gas Line – Step By Step

Propane gas is a commonly popular source of energy in many households and industries. It is highly efficient, cost-effective, and has a low carbon footprint, making it a popular choice for water heater, cooking, and other applications.

However, just like any other fuel, propane gas can develop air pockets within its supply lines, which can cause disruptions in its flow and efficiency. This phenomenon, known as airlock, can also lead to potential safety hazards if not addressed promptly. Therefore, it is essential to know how to purge air from propane gas lines to ensure the smooth and safe functioning of the system.

Here, we will guide you to purge air from propane gas lines, its potential consequences, and, most importantly, the steps to purge air from the lines effectively. So, let us dive into the world of propane gas lines and learn how to purge air like a pro.

How To Purge Air From Propane Gas Line

What Does It Mean To Purge A Gas Line?

Purging a gas line is a process that involves removing any unwanted or hazardous gases from a pipeline or system before it is put into use or maintained. This procedure is typically done to ensure safety in the workplace and prevent accidents or explosions.

Purging a gas line is an important process that should be taken seriously. It involves removing any air or other unwanted substances from the gas line to ensure it functions properly and safely. While this may seem simple, doing it correctly requires specialized equipment and expertise.

Purging avoids the risk of an existing or growing explosive air-gas mixture in consumer pipes, appliances, or restricted locations. This is accomplished by injecting a propane-based inert gas into the pipe. The inert gas in the tube combines with the gas to form a mixture. This reduces the risk of a combustion mix harming customers.

How To Purge Air From Propane Gas Line – Expert Guideline

How To Purge Air From Propane Gas Line – Expert Guideline

Purging a gas line removes air from the line to ensure filling it only with propane or natural gas. Air in the line can cause issues with the performance of your gas appliances, such as reduced efficiency or even complete failure to operate. To purge your gas line, turn off all gas appliances and open the propane tank or natural gas line valve.

Purge all air from the line by allowing a steady stream of gas to flow through it. It is important to take caution when performing this task and follow all safety guidelines to avoid accidents. If you are unsure how to purge your gas line properly, consult a professional. Here is a detailed guide on how to purge air from propane gas lines.

Estimated Cost

Estimated Cost

Purging air from a propane gas line is an important step to ensure the safe and efficient operation of your propane system. While the cost of purging air from a propane gas line can vary depending on factors such as the length of the line and the complexity of the system, it is generally recommended to hire a professional to perform this task.

The estimated cost for purging air from a propane gas line can range from $75 to $150. Still, it is important to contact local propane service providers for accurate pricing information specific to your location and circumstances. Investing in professional service ensures that the job is done correctly and safely, giving you peace of mind and confidence in your propane system.

Time Needed

When purging air from a propane gas line. It is important to allow enough time for the process to be completed thoroughly. The amount of time needed will depend on various factors, such as the length of the gas line and the specific equipment being used. In general, it is recommended to allow at least 10-15 minutes for the purging process.

This will ensure that all air vents are removed from the line and that a safe and efficient flow of propane can be established. It is important to follow proper safety procedures and guidelines when purging air from a propane gas line to prevent any accidents or injuries.

Tools And Materials

To purge air from a propane gas line, you will need the following tools and materials. These items are essential for safely purging air from the propane gas line. Make sure to have them on hand before starting the process to ensure a smooth and successful procedure. Here are the tool and materials list:

  • Adjustable wrench
  • External Propane tank
  • Propane hose or pipe
  • Soap and water solution (to check for gas leaks)
  • Safety goggles and gloves (for protection)

Step 1: Prepare Your Environment

Before purging air from a propane gas line, it is important to prepare your environment to ensure safety. Start by turning off all sources of ignition, such as pilot button lights or electrical devices that could produce sparks. Next, make sure the area is well-ventilated to prevent the build-up of potentially dangerous gases.

Open windows and doors to allow fresh air to circulate. Additionally, have a fire extinguisher nearby in case of any emergencies. Taking these precautions will help create a safe environment for purging air from a propane gas line.

Step 2: Protect Yourself

Wear goggles and gloves to protect your eyes and hands. If you are starting, take precautions to protect your skin because propane is a deadly gas if not handled properly. Protective gear is necessary to do the job. When purging air from a propane gas line. It is important to take safety precautions to protect yourself from potential hazards.

Before beginning the process, ensure that you turn off all ignition sources and there are no open flames in the area. By taking these steps, you can help ensure the safe and effective completion of purging air from your propane gas line.

Step 3: Gas Valve Control Knob

To discharge propane into your gas lines, push the gas valve control knob in and hold and rotate the valve counterclockwise as far as it will go. You have to continue this process till “Pilot” or “Ignition” appears in the “On” position. When maintained in this position, you should push the knob inward a quarter of an inch. The continual flow of propane will force all the air in the line out and into the atmosphere.

Locate the gas valve gas control valves knob near the propane tank or the appliance, which is the gas line connection. Once the knob is located, it should turn off to prevent gas from flowing through the line during purging. Next, the technician must connect a purging device to the gas line.

Step 4: Purging

This device has specific designs to remove any air or other contaminants that may be present in the line. The device is connected to the gas line at one end and a compressed air source at the other. The air is then forced through the line, pushing out any contaminants that may be present.

You must press the igniter button constantly while pressing the diaphragm gas valve control knob until the pilot ignites. As the gas starts to flow, it might take an average of 3 minutes to purge air out of the pipes, as we’ve told you before.

If you are experiencing issues with your propane gas line, purging the air from the system may be necessary. You can do this process relatively quickly, but it is important to follow the proper steps to ensure you can do it safely and effectively.

Step 5: Finishing

Turn off the gas flow after extracting all the air from the line. After the pilot has ignited, press the valve knob inward for 30 seconds before releasing it. Now that you have lit the pilot light, turn the valve to the “On” position. If the pilot light goes out, restart the process.

You can also connect your propane line to a grill to burn off the extra propane. You can repeat this process a minimum of five times. The spark igniter might be the issue if gas flows out of the pilot, but it isn’t lighting. You’ll need to clean away any debris or air between the igniter and the safety pilot system.

Step 6: Last Check

Please securely attach the line to the nozzle on the top of the propane tank. Let the line leak into the atmosphere by leaving the other end open. After purging the propane gas line, it is important to perform a final check to ensure that no air remains in the line. To do this, turn on all of the gas appliances in your home and check each one for proper operation.

If appliances malfunction, turn off the gas supply and repeat the purging process. It is also important to monitor the propane tank levels and refill them as necessary to avoid running out of gas during use. Following these steps and regular maintenance on your propane system can ensure a safe and efficient operation for years.


Using natural gas through a gas line comes with its dangers. If you follow the directions and cautions, you can reduce these dangers to a minimum. Before you begin, have a look at them. When purging air from a propane gas line, it is important to take certain precautions to ensure your safety.

Here are some warnings to keep in mind. Propane gas is highly flammable and dangerous if not handled properly. Make sure to follow all safety guidelines provided by your propane supplier.

  • Before starting the purging process, turn off all appliances connected to the propane gas line.
  • When releasing the air from the gas line, ensure you are in a well-ventilated area and avoid inhaling fumes.
  • Use caution when lighting pilot lights or restarting appliances after purging the air from the gas line.

Following these warnings and taking the necessary safety precautions, you can safely purge air from your propane gas line and ensure your appliances function properly.

What Happens If You Don’t Purge A Propane Line?

What Happens If You Don't Purge A Propane Line

If you do not purge a propane line, it can cause an explosion or fire due to a buildup of air and other gases in the line. Additionally, any contaminants in the line can cause damage to the equipment in use, resulting in costly repairs or replacements.

Until the purging has not happened before filling the gas line with propane, the supply line may experience combustion issues or gas pressure abnormalities. Purging the air from the pipes eliminates any air bubbles and ensures a steady propane supply. Also, you might not detect a gas leak if you do not purge the gas line correctly.

When To Purge?

When you buy a new gas pipe, you should always purge it. Changing the valve might also be another reason to purge your gas line when we expose a line to the environment for whatever reason. We must purge it again before refilling it with new gasoline.

This also implies older gas lines. Purging air from a propane gas line is important in ensuring your propane system’s safe and efficient. Operation if you notice any air signs in your gas line, such as weak or inconsistent flames or hissing noise.

How To Purge Rv Propane Lines

How To Purge Rv Propane Lines

Purging air from propane gas lines in an RV is an essential step to ensure the smooth and safe operation of your propane RV appliance. To purge the RV propane lines. Properly purging your RV’s propane lines ensures that any trapped air is removed, allowing for a steady flow of propane to power your appliances effectively and safely during your travels. Follow these steps:

  1. Make sure you turn off all propane appliances and close the propane tank valve.
    2. Locate the stove burner that is farthest from the propane tank.
    3. Turn on the burner and let it run for a few minutes until the flame burns consistently without sputtering or going out.
    4. Repeat this process with each burner on your RV stove, working your way toward the burner closest to the propane tank.
    5. Once all burners have been purged, turn them off and check for any lingering smell of gas.
    6. If there is still a strong odor of gas or if you are unsure about purging the lines yourself. We recommend contacting a professional from a propane company who can assist you with this process.


Purging air from a propane gas line is an essential step to ensure the safe and efficient operation of your propane system. By following the steps on how to purge air from propane gas line, you can easily purge the air from your gas line and prevent any potential issues or malfunctions.

Remember always to prioritize safety when working with propane, and if you have any concerns or questions, it’s best to consult a professional. With proper purging techniques, you can enjoy the benefits of a well-functioning propane system and peace of mind knowing that your home or business is powered by clean and reliable fuel.

Frequently Asked Questions

In The Winter, Can I Keep My Gas Tank Outside?

If you’re keeping your grill outside for the winter, leave the propane tank attached (but turned off) and cover it with a protective cover once you’re done cleaning it. If you’re going to store the grill indoors, don’t bring the tank with you, even if it’s in the garage or a storage shed.

Is It Possible That Gas Lines May Become Clogged?

Water running into an underground gas supply pipe of an outdoor gas light or appliance may cause a clog or corrosion that clogs the line. A natural gas line can become clogged with only 4″ water correct pressures.

What Causes Fuel Line Air Bubbles?

Any air leak on the vacuum side of the fuel system from the fuel tank pick-up to and including the lift pump causes air bubbles. The fuel gallery’s gasoline return (spill) hose may also include air bubbles.

How Does Air Get In Rv Propane Lines?

Air can enter RV propane lines if there is a leak or if the system is not properly sealed or maintained. This can happen when connections become loose or damaged, allowing air to infiltrate the lines.

Do You Need To Bleed Rv Propane Lines?

Bleeding RV propane lines is unnecessary, but it can be helpful in several circumstances. For example, it can help to clean out the lines, prevent gas from entering the system in obscene amounts, and protect the system from freezing.

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