How to Purge Air from Furnace Gas Line

1. Start by turning off the furnace and shut off the gas supply. 2. Locate the purge port on your furnace, which is usually near the gas valve. It should be labeled as such or with an arrow pointing towards it.

3. Attach a gas line purge pump to the port and connect it to an air compressor hose of at least 60 psi pressure rating, making sure all connections are secure and tight before proceeding further in this process. 4. Turn on both devices (the air compressor and purging pump) until you see some bubbles coming out from the purge port of your furnace; this indicates that you have successfully removed any trapped air inside your system’s pipes or lines.

  • Step 1: Turn off the power to the furnace by switching off the circuit breaker
  • Shut down any other gas-powered appliances in your home, such as a water heater or stove
  • Step 2: Locate and close the shutoff valve for either your natural gas line or propane tank outside of your home
  • This will prevent new air from entering into the line when purging it of old air
  • Step 3: Connect a hose to each end of the gas line that connects from inside your home to its exterior source (either a natural gas connection or propane tank)
  • The hoses should be long enough so you can move them away from any open flames while you are working on purging out air from lines
  • Step 4: Turn on both ends of both hoses until no more water comes out and only an odorless gaseous substance is running through them
  • Make sure all connections are tight and secured before continuing with this step
  • Step 5: Open up one side of one hose and quickly light a match near it; this should remove any remaining traces of oxygen within that section of pipe, allowing only pure flammable gases to remain within it (i
  • , methane, etc
  • Repeat this process at both ends until there is no longer an odor coming from either side, indicating all oxygen has been removed entirely from all sections connected across the length of piping between those two points in time!
How to Purge Air from Furnace Gas Line


How Do You Bleed a Furnace Gas Line?

To bleed a furnace gas line, the following steps should be taken:• Shut off the power to the furnace. • Locate and open the bleeder valve on the gas line.

• Place a rag or other absorbent material beneath the valve to catch any excess gas that may escape. • Turn on all burners of your furnace until you hear them light up and smell natural gas in your home. • Close off each burner one by one, starting from the furthest away from where you are standing, while leaving all others open until only one remains lit.

• Close that last remaining lit burner and quickly shut off its corresponding bleeder valve before it has time to fully close down.In summary, bleeding a furnace gas line involves shutting off its power source, locating and opening its bleeder valve, placing an absorbent material beneath it for safety purposes, turning on each of its burners one at a time until they have all been lit as well as closed again properly before finally closing down its last remaining opened burner followed by shutting off its corresponding bleeder valve immediately afterwards.

Do I Need to Purge Gas Line?

Yes, you need to purge your gas line. This should be done at least once a year. Here are the steps for purging:

– Turn off the gas supply valve – Open all appliances connected to the line and light any pilot lights – Connect an approved container to catch any excess gas

– Slowly open the valve until there is no more of a hissing sound or smell of gas This process will help ensure that your home and appliances stay safe from hazardous gases.

Do You Have to Bleed a Gas Line to a Furnace?

Yes, it is necessary to bleed the gas line to a furnace in order to ensure safe operation. The steps needed for this process are:• Shut off the gas supply.

• Connect a hose from the bleed valve on the gas line at a distance of 5-10 inches away from any appliance that can ignite flames. • Open up the bleeder valve and allow all air bubbles out until only natural gas is flowing through the hose into an open area. • Close up the bleeder valve and check for any leaks with soapy water solution before turning back on the main shutoff valve.

Finally, test run your furnace after bleeding its lines to make sure everything works properly again.

How Do You Purge Air from an Lp Gas Line?

To purge air from an LP gas line, the following steps should be followed: * Shut off the tank valve and regulator. * Open all appliance valves of the system.

* Connect a hose to the service valve outlet on top of the regulator. * Place open end of hose in a bucket filled with soapy water. * Turn on tank valve slowly while watching for bubbles in soapy water.

* When bubbling stops, turn off tank valve and close appliance valves one at a time.

How bleed air out of the gas line to your fireplace

How to Purge Air from Gas Line on Water Heater

If you are experiencing air in your gas line on your water heater, the best way to purge it is by turning off the gas supply valve and disconnecting all of the flex connectors from both sides. Once this has been done, turn back on the gas supply valve and slowly open up each of the flex connectors one at a time until you hear a hissing sound coming from them. This will indicate that all of the air has been purged from your system and now you can reconnect all of your lines to get everything back up and running again.

How to Purge Air from Natural Gas Line

If you are installing a new natural gas line for your home, it is important to purge the air out of the line. This can be done by turning off the main gas valve and attaching a hose from an approved container filled with water to one end of the pipe. Open all valves along the line and turn on each burner until no bubbles appear in the water-filled container.

After purging all air pockets, close each valve and turn off all burners before opening up your main gas valve again.

How to Purge Lpg Gas Line

If you have an LPG gas line connected to your home, it’s important that you occasionally purge out the old gas in order to ensure a safe and efficient flow of fuel. To do this, first turn off the main valve of your LPG tank and open all the burners on appliances connected to the gas line until they are completely purged. Next, locate any air vents located along the pipeline and open them up one by one until there is no longer any sign of escaping gas.

Lastly, close all valves and burner control knobs before turning back on the main valve for your LPG tank. Following these steps will help keep your LPG lines clear from debris and allow for optimal performance!

How to Purge Air from Propane Gas Line

When purging your propane gas line, it is important to do it safely and properly. Start by turning off the valve on the propane tank and then turn on all of the valves in the system until you hear a hissing sound. This indicates that air is being released from the lines.

Next, open each valve slowly one at a time while keeping an eye out for any bubbles coming up through the pipes or fittings, which indicate that there is still air present in them. Once no more bubbles are seen, close each valve tightly and turn back on your propane tank’s main shut-off switch before using your appliance or heater again.

How to Purge a Gas Line before Cutting

Gas lines must be purged properly before cutting to avoid any dangerous accidents or fires. To purge a gas line, first shut off the main valve and open all of the fixtures downstream. Then, close the downstream fixtures one by one while venting any remaining gas out of each fixture until there is no longer any smell of gas.

Once this is complete, it’s safe to proceed with cutting the gas line as needed.

How to Bleed Gas Line on Stove

If you need to bleed the gas line on your stove, you should first turn off the main gas valve and make sure all burners are turned off. Then, use a wrench to loosen the coupling nuts found at the end of each pipe connected to the stove. Next, open both valves slowly until a steady flow of gas is achieved and then close them again.

Finally, relight any pilot lights that may have been extinguished during this process and check for leaks with soapy water before restoring power to your appliance.

How to Purge Air from Gas Line on Tankless Water Heater

To purge air from the gas line on a tankless water heater, you must first turn off the main gas supply and then open all hot water faucets in your home. Once this is done, restart the tankless water heater by pressing the reset button. After that, make sure to check for any leakage around connections or valves before turning on the main gas supply once more.

Finally, if there are still air bubbles present within the lines of your tankless water heater, you will need to manually bleed them out using a wrench or other appropriate tool.

Air in Natural Gas Line Symptoms

A buildup of air in natural gas lines can be dangerous and present a variety of symptoms. The most common symptom is an unusual smell, which may have a “rotten egg” or sulfur-like odor. Other signs include decreased pressure from the pipelines and dimming lights due to insufficient gas flow.

If you suspect that there is air in your natural gas line, it’s important to immediately contact your local energy provider for assistance.


In conclusion, purging air from a furnace gas line is a relatively simple and straightforward process. With the right tools and knowledge, you can successfully purge any remaining air from your furnace’s gas line. However, if at any point you feel unsafe or unsure of what to do, it may be best to contact an expert for professional assistance.

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