How to Remove Air from a Water Line

Air in a water line not only impedes the flow of water through the line, but can also cause hammering and banging in pipes. This can damage pipes or water lines, leading to costly repairs. The main trick to removing air from a water line is to find the connection where you can let the air out, also known as bleeding. You can use this trick on water lines, both indoors and out.

Remove air from a water line.
  1. Locate the nearest coupling or connection in the water line. This could be where it connects to the faucet, or where the water line connects to a fixture, such as a sprinker.

  2. Turn the water on at the supply end.

  3. Slowly open the coupling or connection. Use a pair of pliers or adjustable wrench, if needed. After a few seconds, you should be able to see water start to leak out.

  4. Close the coupling or connection and tighten.

  5. Shut off the water at the supply.

  6. Start the water back up at the supply valve. Observe the water line and ensure that it works properly.


  • The above steps are just a guideline. Your water system may differ from that described above. If in doubt, consult a professional.

About the Author

Nathan McGinty started writing in 1995. He has a Bachelor of Science in communications from the University of Texas at Austin and a Master of Arts in international journalism from City University, London. He has worked in the technology industry for more than 20 years, in positions ranging from tech support to marketing.