How to Blow Out and Winterize a Sprinkler System using a small air compressor

Introduction

This tutorial will guide you through the process of winterizing your sprinkler system by blowing it out with a small air compressor. Proper winterization prevents damage to your irrigation system during cold months, and using a small compressor can save you money compared to hiring professionals. With the right tools and techniques, you can do this safely and effectively.

Step 1: Gather Necessary Tools and Materials

Before you begin, make sure you have the following items ready:

• Small air compressor (with at least 2-3 CFM)
• Connection fittings for your compressor
• Safety goggles
• Gloves
• Drainage hose (optional)
• A timer or stopwatch (to track blowing out time)

Tips:

• Ensure your compressor is in good working order and has enough pressure capability.
• Wearing safety goggles and gloves is essential for protection.

Step 2: Prepare the Sprinkler System

1. Turn off the Water Supply: Locate the main water shut-off valve for your sprinkler system and turn it off to prevent water from entering the system while you are working.
2. Drain the System:
   • Open the drain valves at the lowest point of your sprinkler system to allow any remaining water to escape.
   • If your system has manual drain valves, open them to let out the water.

Common Pitfall:

• Failing to completely drain the system can lead to freezing water, which may cause cracks in the pipes.

Step 3: Attach the Compressor to the Sprinkler System

1. Locate the Blowout Port: This is usually a valve or fitting designed for this purpose.
2. Connect the Air Compressor: Use the appropriate fittings to securely attach your air compressor to the blowout port of your sprinkler system.
3. Seal Connections: Ensure all connections are tight to prevent air leaks.

Step 4: Blow Out the Sprinkler System

1. Start the Air Compressor: Turn on the compressor and set it to a low pressure setting (around 30 PSI).
2. Open the System Valves: Gradually open the valves of each zone in your sprinkler system one at a time.
3. Monitor the Airflow: Watch as water is expelled from the sprinkler heads. This indicates that the water is being blown out of the system.

Timing:

• Allow each zone to run for about 2-3 minutes or until no more water is visible.

Step 5: Final Steps and Check

1. Close the Valves: Once all zones have been blown out, close the valves to each zone.
2. Disconnect the Compressor: Carefully detach the air compressor from the blowout port.
3. Check for Remaining Water: Inspect the system to ensure there is no residual water left in pipes or valves.

Conclusion

Winterizing your sprinkler system by blowing it out with a small air compressor is a straightforward process that can save you money and prevent costly repairs. By following these steps, you ensure that your irrigation system remains in good condition through the winter months. After winter, remember to check your system before turning it back on in spring to ensure it is functioning properly.