How to CLOSE (Winterize) an Inground POOL | Swim University

Introduction

Winterizing your inground pool is a crucial step to ensure its longevity and maintain water quality during the colder months. This guide will walk you through the essential steps to properly close your pool, from cleaning and testing the water to covering it for winter.

Step 1: Clean and Test Pool Water

• Remove Debris: Use a skimmer net to remove leaves, bugs, and other debris from the pool surface.
• Brush the Walls: Brush the pool walls and floor to dislodge any dirt or algae.
• Vacuum the Pool: Vacuum the pool to remove sediment from the bottom.
• Test Water Chemistry: Use a pool testing kit to check pH, alkalinity, and chlorine levels.
  • Adjust Chemicals: Balance the water chemistry as needed before the winter.

Step 2: Drain Pool Below Skimmer

• Lower Water Level: Use a submersible pump or the pool's drain to lower the water level to just below the skimmer.
• Check Local Regulations: Ensure you are following local regulations regarding water drainage.

Step 3: Blow Out Pool Lines

• Prepare Air Compressor: Connect a compressor or a blower to the pool's return lines.
• Remove Fittings: Take off any fittings or plugs from the return lines and skimmer.
• Blow Out Lines: Blow out each line until water is expelled. This step prevents pipe freezing.
• Plug Lines: Seal the lines with winterizing plugs or caps to keep them protected.

Step 4: Add Winter Pool Chemicals

• Use Winter Chemicals: Add appropriate winterizing chemicals to the pool water.
  • Algaecide: Add algaecide to prevent algae growth.
  • Chlorine: Use a chlorine shock treatment to sanitize the water.
• Follow Manufacturer Instructions: Always refer to the instructions on the chemical containers for proper dosages.

Step 5: Add Winter Cover

• Select a Cover: Choose a winter pool cover that fits your pool size.
• Install the Cover: Secure the cover over the pool, ensuring it is tight and free of wrinkles.
• Weight the Cover: Use water bags or bricks to keep the cover in place against wind.

Conclusion

Successfully winterizing your inground pool involves cleaning and testing the water, draining the pool, blowing out the lines, adding winter chemicals, and securing a winter cover. Following these steps will protect your pool during the colder months and help it stay in good condition for the next swimming season. For more detailed instructions or additional pool care tips, consider visiting Swim University's website or checking out their resources.