Winterization is the most crucial component of any inground pool closing. Closing your pool is required if temperatures reach 32 degrees Fahrenheit to protect it from freezing temperatures, wind and debris. Frozen pipes will burst, and dirt left in the pool will cause staining. Here is a detailed, step-by-step guide to help you properly close your pool for the winter.
Step 1: Gather Necessary Supplies
Before you start, always make sure you have the necessary supplies, including:
- Pool cover
- Winterizing chemicals (pool antifreeze, algaecide, shock)
- Air compressor or shop vac
- Pool brush and net
- Pool water test kit
- Plugs for the skimmers (gizzmos) and return lines
- Pool filter cleaner
- Pool antifreeze (for climates with below-freezing temperatures)
- Expansion plugs
Step 2: Clean the Pool
- Remove debris: Use a pool net to remove leaves, insects, and other debris from the water surface.
- Brush and vacuum: Brush the walls and floor of the pool to remove any algae or buildup. Then, vacuum the pool to remove the debris you’ve loosened.
- Clean the filter: Depending on your filter type (sand, cartridge, DE), clean it according to the manufacturer’s instructions.
Step 3: Balance the Water Chemistry
- Test the water: Use a pool water test kit to check the levels of pH, alkalinity, calcium hardness, and chlorine.
- Adjust the chemicals: Adjust the water balance to the recommended levels. This usually means a pH of 7.2-7.6, alkalinity of 80-120 ppm, and calcium hardness of 180-220 ppm. Balancing the water helps protect the pool from corrosion or scale buildup over the winter.
Step 4: Add Winterizing Chemicals
- Shock the pool: Add a large dose of chlorine or a non-chlorine shock to kill any lingering bacteria or algae. Perform this step a couple days before you plan to close the pool. Leave the pump on and the water circulating for 24 hours after shocking.
- Add algaecide: After the chlorine level has returned to normal, add an algaecide to prevent algae growth over the winter.
Step 5: Lower the Water Level
- Lower the water: If you live in an area where freezing occurs, lower the water level below the skimmer and return lines to prevent freezing damage. For areas without severe freezing, you may not need to lower the water as much, but always follow the manufacturer’s or a local professional’s advice.
Step 6: Drain Equipment
- Pump and filter: Drain water from the filter, heater, (if applicable), pool pump, and the rest of your equipment according to the manufacturer’s instructions. This may involve opening drain plugs on these devices.
- Blow out the lines: Use an air compressor or shop vac to blow water out of the plumbing lines. Seal the lines with plugs to prevent water from re-entering.
Step 7: Protect from Freezing
- Add pool antifreeze: In areas with harsh winters, add non-toxic pool antifreeze to the skimmer lines and plumbing.
- Install skimmer protection: Use a skimmer guard or gizzmo to absorb any expansion from freezing water and protect your skimmer from cracking.
Step 8: Cover the Pool
Secure the pool cover: Place the winter cover over the pool, ensuring it’s secure and tight to prevent debris from entering and water accumulation on the surface. Use water bags, aqua blocks, or other recommended methods to secure the cover around the pool’s edge.
Step 9: Monitor Throughout Winter
- Check the cover: Regularly check the pool cover to ensure it’s secure and free of damage. Remove any standing water or debris from the cover.
- Maintain water level: For areas with mild winters, monitor the water level and adjust as necessary to prevent damage to the cover or pool structure.
10. Safety Check
Inspect all pool safety features, such as fences, gates, and pool alarms, to ensure they are in good working order
Closing your pool properly for the winter can save you a lot of time and money on repairs for the next season. Always refer to your pool manufacturer’s guidelines for specific instructions related to your pool type and equipment.
