A Guide to Closing Your Pool

As the competitive swimming season winds down and community members take their last laps, it’s time to start preparing your municipal or competition pool for the off-season. Closing a commercial pool isn’t just about putting a cover on either; it’s about ensuring that everything is set for an efficient, trouble-free reopening next year. Let’s dive into seven key steps to help you close your commercial pool like a pro.

1. Thoroughly Clean and Inspect the Pool

Before you close up shop, give your pool a thorough cleaning. This includes skimming, vacuuming, brushing down surfaces to remove debris, and cleaning pool tiles and lane lines. But don’t stop there—take the opportunity to inspect the pool for any wear and tear, cracks, or damage that might need attention. 

Tip: A spotless pool and a detailed inspection now can extend its lifespan and save you from bigger issues (and costs) when you reopen. 

2. Balance the Water Chemistry

Ensure the water chemistry is balanced according to commercial pool standards. This includes checking the pH, alkalinity, and calcium hardness levels. If you’re in a colder climate, use a winterizing chemical kit designed for commercial pools to maintain water quality during the off-season. 

Tip: Proper chemical balance at closing time reduces the risk of corrosion, scaling, and algae growth over the winter. 

3. Manage Water Levels

How you manage water levels in the off-season should always align with manufacturer guidelines and depends on your pool’s unique infrastructure, but here are some general guidelines to follow: 

  • Complete Drainage: If your pool is designed to be fully drained, ensure that the process is done gradually to avoid placing stress on the pool’s structure. Once drained, inspect the pool shell for any cracks or damage that may have occurred during the season. 

    For many municipal pools, completely draining the pool is a standard practice during the off-season, especially in regions where freezing temperatures are common. Draining the pool can help prevent freeze damage, protect the pool structure, and make maintenance easier. 

  • Partial Drainage: In some cases, it may be recommended to only partially drain the pool, especially if it has a vinyl liner or fiberglass shell. For competitive pools, it’s common to lower the water level to just below the skimmer or tile line to reduce the risk of freeze damage while still maintaining enough water to support the structure. Consult your pool builder or manufacturer for guidance on the best approach for your specific pool. 
  • Non-Freezing Climates: If your pool operates year-round or is in a region where freezing isn’t a concern, maintaining a normal or slightly elevated water level may be advisable to reduce structural stress and ease reopening. 

Tip: Always follow manufacturer guidelines and consult with your pool service provider to determine the best approach for your specific pool infrastructure. 

4. Service and Store Pool Equipment

Your commercial pool’s equipment—pumps, filters, heaters, and other systems—needs special attention during the closing process. Drain, clean, and store the equipment according to manufacturer guidelines to prevent damage from freezing temperatures. Schedule any necessary maintenance or upgrades during this downtime. 

Tip: Properly maintained equipment means fewer headaches and a smoother start when the pool reopens. 

5. Install a High-Quality Commercial Pool Cover

Consider investing in a durable, high-quality pool cover designed for commercial use. It should be capable of handling harsh winter conditions, including snow, ice, and debris. Ensure the cover is securely fastened to prevent wind damage or accidental removal. 

Tip: A well-secured cover not only protects your pool but also reduces the amount of cleaning needed when you reopen. 

6. Winterize Plumbing and Filtration Systems

If your pool is in a colder climate, it’s essential to winterize the plumbing and filtration systems. Blow out water from pipes and add antifreeze if necessary to prevent freezing and bursting. Disconnect and store any exposed piping or hoses to avoid winter damage. 

Tip: Winterizing these systems ensures they remain functional and ready to go when the weather warms up. 

7. Document the Closing Process

Keep a detailed record of the steps you’ve taken to close the pool, including water chemistry levels, equipment maintenance, and cover condition. This documentation will be invaluable when it’s time to reopen, helping you identify any issues quickly and ensuring a smooth transition back into operation. 

Tip: A comprehensive log makes reopening more efficient and helps maintain consistency year over year. 

Investing time into closing your commercial pool the right way will save you both time and money in the long run. By following these seven tips, you’ll protect your investment, extend the life of your equipment, and make reopening next season much easier. Remember, the effort you put in now sets the stage for a successful and stress-free start when the pool is ready to welcome swimmers again.