How to Blow Inground Pool Lines Out: A Step-by-Step Guide

How to Blow Inground Pool Lines Out

Blowing out your inground pool lines is an essential step in winterizing your pool to prevent damage from freezing temperatures. Properly blowing out the lines helps remove any excess water that can freeze and cause the pipes to burst. In this blog post, we will guide you through the process of blowing out your inground pool lines effectively.

Materials Needed:

Before you start blowing out your inground pool lines, make sure you have the following materials on hand:

  • Air compressor
  • Air hose
  • Adapter fittings
  • Plugs or winterizing caps
  • Teflon tape
  • Pool winterizing chemicals
  • Bucket
How to Blow Inground Pool Lines Out: A Step-by-Step Guide


Steps to Blow Out Inground Pool Lines:

  1. Turn off the pool pump and filter system.
  2. Remove drain plugs from the pump, filter, and any other pool equipment that may collect water.
  3. Attach the air hose to the air compressor using the appropriate adapter fittings.
  4. Locate the blowout plugs on the pool equipment and remove any caps or plugs covering them.
  5. Connect the air hose to the blowout plug of the first pool line.
  6. Turn on the air compressor and set it to a low pressure setting, around 20-25 PSI.
  7. Slowly introduce air into the pool line until you see water coming out from the other end.
  8. Continue blowing air through the line until only air is coming out without any water.
  9. Repeat the process for each pool line, starting with the main drain and then moving to the skimmer and return lines.
  10. Once all pool lines are blown out, add pool winterizing chemicals to the water to prevent algae growth and protect the pool during the winter months.
  11. Replace drain plugs on pool equipment and apply Teflon tape to ensure a tight seal.
  12. Place winterizing caps or plugs on the blowout ports to prevent any debris or critters from getting into the lines.

Tips for Blowing Out Pool Lines:

Here are some additional tips to keep in mind when blowing out your inground pool lines:

  • Start blowing out the lines well before the first freeze to ensure all water is removed.
  • Work methodically through each pool line to ensure thorough cleaning.
  • If you encounter any resistance when blowing out a line, stop immediately to prevent damage to the pipes.
  • Check the pressure gauge on the air compressor regularly to ensure it stays within the recommended range.
  • Store your pool equipment and supplies in a dry, protected area during the winter months to prevent damage.
How to Blow Inground Pool Lines Out: A Step-by-Step Guide



Blowing out your inground pool lines is a crucial step in preparing your pool for the winter. By following the steps outlined in this guide and using the right materials, you can effectively remove water from the lines and protect your pool from freezing temperatures. Remember to start early, work methodically, and take the necessary precautions to ensure a successful winterization process for your inground pool.

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