How to Blow Out Return Lines on a Pool: Effortless Guide

Blowing out the return lines on a pool is a crucial step in winterizing your pool to prevent damage from freezing temperatures. This process involves removing water from the lines to ensure they do not freeze and burst during the colder months. By following a few simple steps, you can effectively blow out the return lines on your pool and protect your investment.

How to Blow Out Return Lines on a Pool: Effortless Guide


Materials Needed

Before you begin the process of blowing out the return lines on your pool, make sure you have the following materials on hand:

  • Air compressor
  • Air hose
  • Plug or winterizing cap
  • Adjustable wrench
  • Teflon tape

Step-by-Step Guide to Blowing Out Return Lines

Follow these steps to properly blow out the return lines on your pool:

  1. Turn off the pool pump and filter system to ensure no water is circulating through the lines.
  2. Locate the return lines on your pool. These are the pipes that carry water back into the pool from the filter system.
  3. Remove the eyeball fittings or any other attachments from the return lines using an adjustable wrench.
  4. Attach the air hose from the air compressor to the return line. Make sure it is securely attached to prevent air leaks.
  5. Turn on the air compressor and set it to a low pressure setting. Slowly introduce air into the return line to push out any remaining water.
  6. Monitor the pressure gauge on the air compressor to ensure it does not exceed the recommended pressure for your pool system.
  7. Continue blowing air through the return line until only air is coming out and no water is present.
  8. Once all the water has been removed, turn off the air compressor and disconnect the air hose from the return line.
  9. Insert a plug or winterizing cap into the return line to seal it and prevent any debris from entering during the winter months.
  10. Repeat the process for each return line on your pool to ensure all lines are properly blown out and sealed.

Tips for Effective Blowing Out of Return Lines

Here are some additional tips to ensure the blowing out of return lines on your pool is done effectively:

  • Check the manufacturer’s recommendations for the recommended air pressure for your specific pool system.
  • Work methodically through each return line to ensure all water is removed and the lines are properly sealed.
  • If you encounter resistance when blowing out the lines, stop immediately and investigate the cause before proceeding.
  • Use Teflon tape to seal the plug or winterizing cap to prevent air leaks and ensure a tight seal.
  • Store your air compressor and hoses in a dry, protected area after use to prevent damage and ensure they are ready for future winterization.
How to Blow Out Return Lines on a Pool: Effortless Guide



Blowing out the return lines on your pool is a vital step in preparing your pool for the winter months. By following the simple steps outlined in this guide and using the right materials and techniques, you can ensure that your pool is protected from potential damage caused by freezing temperatures. Remember to take your time, work carefully, and always refer to the manufacturer’s instructions for specific guidance on your pool system. With proper winterization, you can enjoy a stress-free pool opening in the spring and prolong the life of your pool equipment.

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