Purging Air From Water Heater Gas Lines

April 19, 2023

If your water heater is not working properly, you may need to purge the air from the gas line. This process helps ensure that the gas is being delivered to your appliance efficiently and without interruption. The professionals at Charlotte Plumbing are here to help you through this process, step by step. Of course if you'd prefer to leave this task to the professionals, we're here to answer the call!

Signs There Is Air in Your Gas Line

If your water heater is not achieving the desired temperature level, it could be due to air in the gas line. Other signs of air in the line include high or low-pitched sounds coming from the gas valve when turned on and a decrease in pressure at certain points along the pipe. 

How to Purge Air from Your Water Heater's Gas Line

Here are some steps you can take to get started with purging air from your water heater's gas line: 

  • Turn off the gas supply to your water heater.
  • Disconnect the inlet and outlet gas lines from the water heater. 
  • Connect a hose to the water heater's inlet line and run it outside, away from windows and doors.
  • Open all hot water faucets throughout your home and let them run for several minutes. 
  • Turn the gas back on and allow it to run for 30 seconds or until you hear a hissing sound coming from the hose connected to your water heater's inlet line.
  • Close all hot water faucets in your home and disconnect the hose from the water heater's inlet line. 
  • Reattach the inlet and outlet gas lines to the water heater.
  • Turn on your water heater and check that it is functioning properly.

Following these steps will help ensure that all air has been purged from your water heater's gas line, allowing for efficient operation of your appliance.

When Should I Hire a Professional to Purge My Gas Line?

If you are not comfortable performing this procedure yourself, it is best to hire a professional. For your own safety, it is important to make sure that the job is done right. Any time you're working with gas, there is a risk of carbon monoxide poisoning. To ensure the safety of your family and home, contact the experienced technicians at Charlotte Plumbing for help! 

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