how to blow out pool lines

4 min read 16-01-2025

Meta Description: Learn how to properly blow out your pool lines to protect your plumbing system from winter damage. This comprehensive guide covers tools, techniques, and safety tips for a successful blowout. Prevent costly repairs and extend the life of your pool equipment with this essential winterizing step.

Protecting Your Investment: Why Blow Out Pool Lines?

Winterizing your pool is crucial to prevent damage from freezing temperatures. One of the most important steps is blowing out your pool lines. Water left inside the lines can expand as it freezes, causing cracks, leaks, and potentially significant damage to your pool's plumbing system. Blowing out the lines removes the water, safeguarding your investment. This process is essential whether you're in a cold climate or simply want to extend the lifespan of your pool equipment.

Tools and Materials You'll Need

Before you begin, gather the necessary tools. Having everything prepared makes the process smoother and more efficient.

Air Compressor: A powerful compressor capable of delivering a high volume of air is essential. Choose one with sufficient CFM (cubic feet per minute) to handle your pool's plumbing system effectively.
Blow Out Plugs: These plugs are specifically designed for pool lines and create an airtight seal. Ensure you have the correct size for your lines.
Pool Line Plugs: These are used to seal off the ends of the lines. Different types exist for different line sizes and configurations.
Garden Hose: A standard garden hose is helpful for flushing the lines before blowing them out.
Shop Towels or Rags: These are useful for cleaning up any spills or debris.
Safety Glasses: Always protect your eyes when working with compressed air.
Gloves: Gloves offer protection from potential abrasions or cuts.
Pool Vacuum (Optional): This can help remove debris before the blowout.

Step-by-Step Guide to Blowing Out Pool Lines

This guide provides a comprehensive approach. Follow the steps carefully for optimal results.

1. Prepare Your Pool

Begin by turning off all pool equipment, including the pump and filter. Next, thoroughly clean the pool. Remove leaves, debris, and other contaminants. A clean pool facilitates a more effective blowout. Consider vacuuming the pool floor and walls to remove any remaining debris. This will help prevent clogs during the blowing out process.

2. Turn Off and Drain the Pool Equipment

It's essential to turn off and drain all water from your filter, pump, heater and other pool equipment before proceeding. Refer to your equipment's manual for specific instructions. This prevents damage to these components during the freezing temperatures of winter.

3. Flush the Lines

Before you begin blowing out your pool lines, flush them to remove any loose debris or sediment that could interfere with the process. Attach a garden hose to the return line, turn on the water, and allow it to flow through the system for a few minutes. Repeat this process for other lines as necessary.

4. Attach the Blow Out Plugs

This is a crucial step to ensure effective air pressure. Carefully attach blow-out plugs to each line's outlet. Securely tighten them to create an airtight seal. Make sure the plugs are correctly sized and positioned for a proper fit. Air leaks will reduce the effectiveness of the blowout.

5. Connect the Air Compressor

Connect the air compressor hose to the appropriate blow-out plugs. Ensure a tight connection to prevent air leaks. The air compressor will push the water out of the lines.

6. Blow Out the Lines

Turn on the air compressor and slowly increase the air pressure. Monitor the lines closely. You should see water flowing out of the lines, indicating that the air is pushing the water through. Pay close attention to the flow. Any resistance might indicate a clog, and you may need to troubleshoot the specific line.

7. Check for Complete Removal of Water

Once the water flow stops, continue running the compressor for a few more minutes to ensure all water is removed. Then, carefully remove the blow-out plugs and inspect the lines.

8. Add Antifreeze (Optional)

For added protection in extremely cold climates, consider adding RV antifreeze to the lines after the blowout. Follow the manufacturer's instructions for the appropriate amount and method of application. This antifreeze protects against remaining moisture.

9. Secure Your Equipment

Finally, protect your pool equipment from the elements. Cover pumps and filters with appropriate covers, and take any additional steps to safeguard your system during the winter months.

Troubleshooting Common Issues

Slow Airflow: This could indicate a clog in the lines. Try flushing the lines again or using a plumbing snake to clear obstructions.
Leaks: Check the connections for leaks and ensure the blow-out plugs are tightly sealed. Repair any leaks before proceeding.
Compressor Issues: If the compressor isn't working correctly, try a different compressor or contact a professional for assistance.

When to Call a Professional

While blowing out pool lines is a manageable DIY task for many, there are situations where calling a professional is recommended. If you're uncomfortable working with air compressors or experience persistent issues, it's best to contact a qualified pool professional. They possess the expertise and tools to handle any complex situations effectively. They can ensure the job is completed correctly and prevent potential damage to your pool's plumbing system.

By following this guide, you can confidently blow out your pool lines, protecting your investment and ensuring your pool is ready for the next swimming season. Remember safety first! Always wear appropriate safety gear and, if unsure about any step, consult a professional.