inground pool winterization

As autumn leaves begin to fall and the chill of winter whispers in the air, it’s time for homeowners with inground pools to think about an essential task: winterization. At Accurate Pool and Landscape, we understand that preparing your pool for the colder months is not just a routine chore; it’s a crucial step to ensure its longevity and efficiency. Winterizing your pool properly can prevent damage caused by freezing temperatures and keep your pool in pristine condition for when the warm sun returns.

But what does it mean to winterize an inground pool, and why is it so important? In simple terms, winterization involves a series of steps to protect your pool from the harsh winter elements. It’s a process that safeguards the pool structure, plumbing, and equipment from potential freeze damage and prepares the water chemistry to stay balanced during the off-season.

In this comprehensive guide, we’ll walk you through everything you need to know about inground pool winterization. Whether you’re a seasoned pool owner or new to the process, our expert tips and step-by-step instructions will ensure your pool hibernates safely through the winter and is ready to make a splash next summer. So, let’s dive in and explore the world of pool winterization, brought to you by the experienced team at Accurate Pool and Landscape.

Understanding Pool Winterization

Why Winterize Your Inground Pool?

Winterizing an inground pool might seem like a daunting task, but understanding its significance can make the process more approachable and less overwhelming. At its core, winterization is about protecting your investment. In regions where temperatures drop significantly, water can freeze and expand, causing potential damage to your pool’s structure, plumbing, and filtration system. By winterizing your pool, you’re essentially safeguarding it against these risks, ensuring that when summer rolls around again, your pool is in top condition, ready for enjoyment without costly repairs or extensive maintenance.

The Benefits of Proper Winterization

Protection Against Freeze Damage: Water expands as it freezes, and this can lead to cracked pipes, damaged filters, and even structural damage to the pool itself. Winterization ensures that the water in your pool and its components does not freeze, thereby preventing such damage.

Maintaining Water Balance: Keeping the water chemistry balanced even in the off-season reduces the likelihood of problems like algae growth and scale buildup, making it easier to reopen the pool.

Cost Savings: By preventing damage and maintaining your pool’s condition, you save on potential repair costs and extend the life of your pool.

When to Begin the Winterization Process

Timing is everything when it comes to pool winterization. Ideally, the process should begin when the water temperature consistently falls below 60 degrees Fahrenheit (15 degrees Celsius). This temperature is crucial because it’s low enough to prevent algae growth but not so cold that the water has a chance to freeze. In most climates, this typically occurs in the late fall, but it can vary based on your geographical location. Keep an eye on the local weather forecast and start planning your winterization strategy accordingly.

Understanding the why and when of pool winterization sets a solid foundation for the actual process. As experts in the field, Accurate Pool and Landscape emphasizes the importance of this annual routine, not just as a maintenance task, but as a vital measure to protect and preserve your inground pool. In the following sections, we’ll delve into the practical steps and expert tips to ensure your pool is well-prepared for its winter slumber.

Pre-Winterization Checklist

Before diving into the detailed steps of winterizing your inground pool, it’s important to prepare with a thorough pre-winterization checklist. This preparatory phase ensures that your pool is in the best possible condition before it’s closed for the winter. Accurate Pool and Landscape recommends the following steps:

Thoroughly Clean Your Pool

Remove Debris: Skim the pool’s surface, vacuum the bottom, and clean out the skimmer baskets. This step is crucial to prevent any debris from decomposing in the pool during the winter, which can cause staining and algae growth.

Brush the Sides and Floor: Algae and other bacteria can cling to the pool’s surfaces. Brushing helps dislodge these, making the pool easier to clean and maintain.

Inspect and Prepare Pool Equipment

Pump and Filter: Check your pump and filter for any signs of wear or damage. Clean the filter as per the manufacturer’s instructions to ensure it’s ready for the next season.

Heaters, Skimmers, and Plumbing: Inspect heaters and skimmers for any debris or damage. Also, check all plumbing connections for leaks or loose fittings.

Balance the Water Chemistry

Test and Adjust: About a week before closing the pool, test the water and adjust the pH, alkalinity, and calcium hardness levels. Ideal levels should be pH: 7.2-7.6, alkalinity: 80-120 ppm, and calcium hardness: 180-220 ppm.

Shock the Pool: Apply a heavy, chlorine-based shock to kill any lingering bacteria or algae. It’s important to do this a few days before closing the pool to allow the chlorine level to return to normal.

Lower the Water Level (If Necessary)

Check Manufacturer’s Recommendations: Depending on your pool type and the winter cover you’ll be using, you may need to lower the water level. Usually, this is about 4-6 inches below the skimmer for mesh covers and at the skimmer level for solid covers.

Step-by-Step Guide to Winterizing an Inground Pool

After completing the pre-winterization checklist, you’re ready to proceed with the actual winterization process. Accurate Pool and Landscape provides a detailed, step-by-step guide to ensure your inground pool is well-protected throughout the winter months.

Drain the Pool to the Appropriate Level

Not Too Empty, Not Too Full: Lower the water level to prevent freeze damage but ensure there’s enough water to support the cover. For most pools, this means draining the water 4-6 inches below the skimmer or tile line.

Add Winterizing Chemicals

Algaecide and Pool Enzymes: Apply a quality algaecide and pool enzymes to prevent algae growth and break down non-living organic contamination during the off-season.

Winterizing Kit: Consider using a winterizing chemical kit, which usually includes everything needed to keep your pool water balanced and protected over the winter.

Blow Out the Lines

Prevent Frozen Pipes: Use an air compressor or shop vac to blow water out of the pool’s plumbing lines. This step is crucial to prevent pipes from freezing and cracking.

Plug the Lines: After blowing out the lines, plug the openings to keep water out. Antifreeze can be added to the lines as an extra precaution, especially in colder climates.

Secure the Pool Cover

Choose the Right Cover: Use a winter cover that fits your pool correctly. It should cover the entire surface and be secured tightly to prevent debris and water accumulation.

Safety First: If you have a safety cover, ensure it’s anchored securely. Safety covers are effective at keeping out debris and preventing accidental submersion.

Protect the Equipment

Pool Pump and Heater: Drain any water from the pool pump, heater, and filter. Disconnect the pump and heater, if possible, and store them in a dry, safe place.

Filter Care: For sand or DE filters, perform a backwash, and for cartridge filters, remove and clean the cartridge.

Final Check and Clean-Up

Inspect the Area: Walk around the pool area to ensure everything is in order, and there’s no equipment left out that could be damaged by winter weather.

Tidy Up: Store away ladders, hoses, toys, and other pool accessories in a dry, secure place.

Advanced Tips and Tricks

While the basic steps of pool winterization are crucial, there are additional insights and advanced tips that can further protect your pool and make the process smoother. Accurate Pool and Landscape shares some expert advice and common pitfalls to avoid:

Dealing with Unique Pool Features

Special Features: If your pool has unique features like waterfalls, fountains, or custom plumbing, ensure they are properly drained and protected. These features often require special attention to prevent freeze damage.

Vinyl Liner Pools: Be cautious with the water level in vinyl liner pools. Draining too much can cause the liner to shrink or become damaged.

The Right Use of Pool Antifreeze

Safe and Effective: When using antifreeze, ensure it’s specifically designed for pools. Automotive antifreeze is not suitable and can be harmful to your pool system and the environment.

Application: Apply antifreeze to the pool lines following the manufacturer’s guidelines. This is especially important in climates where the freeze is deep and prolonged.

Cover Care and Maintenance

Regular Checks: Throughout the winter, periodically check your pool cover for any tears or sagging. Accumulated water or heavy snow on the cover should be removed using a pump or a broom for snow.

Anchor Security: Make sure the cover anchors and springs are tight and secure, as they can loosen over time.

Balancing Pool Chemistry Before Closing

Last-Minute Adjustments: Right before you close the pool, retest and readjust your pool’s chemistry if necessary. A balanced pool before closing can mean an easier opening in the spring.

Common Mistakes to Avoid

Ignoring Small Repairs: Address any minor repairs before closing your pool. Small issues can become big problems over the winter.

Forgetting to Document: Keep a record of what you’ve done during winterization. This can be a helpful reference when it’s time to reopen the pool.

When to Call the Professionals

While many aspects of pool winterization can be handled by a diligent homeowner, there are situations where the expertise of a professional pool service, like Accurate Pool and Landscape, becomes invaluable. Understanding when to call in the experts can save you time, prevent potential damage, and ensure that your pool is properly cared for during the winter months.

Complex Pool Systems

Advanced Features: Pools with sophisticated features like automated control systems, intricate plumbing, or specialized equipment may require professional handling to ensure everything is correctly winterized.

Custom Designs: Unique pool shapes or custom designs often have specific requirements that standard winterization procedures might not cover.

Dealing with Repairs

Identifying Issues: If you notice any damage or wear that needs repair, such as cracks in the pool structure, leaks in the plumbing, or malfunctioning equipment, it’s time to call a professional. Addressing these issues before winter sets in is crucial.

Quality Repairs: Professional services can ensure that repairs are done correctly and with the right materials, extending the life of your pool.

Safety Considerations

Electrical Systems: Any concerns with electrical components, like pool lighting or heating systems, should be addressed by professionals to ensure safety and proper functionality.

Heavy Lifting: Installing or removing heavy pool covers, especially safety covers, can be a daunting task. Professionals have the necessary equipment and expertise to handle this safely.

Peace of Mind

Expertise and Experience: Pool professionals have the knowledge and experience to anticipate and handle issues that might not be obvious to the average pool owner.

Warranty Protection: Some pool components might have warranties that require professional servicing or inspections for the warranty to remain valid.


Winterizing your inground pool is an essential process that safeguards its longevity, functionality, and beauty. Throughout this guide, we’ve covered the crucial steps from understanding the basics of pool winterization to the detailed steps required to prepare your pool for the colder months. We’ve also delved into advanced tips and stressed the importance of knowing when to call in the professionals, like Accurate Pool and Landscape.

As we wrap up, remember that winterization is more than a seasonal chore; it’s a vital practice to ensure your pool remains a source of joy and relaxation year after year. By following the steps outlined, you can rest assured that your pool will survive the winter unscathed and be ready to welcome you back as soon as the warm weather returns.

If you ever find yourself unsure about any step of the process or if you encounter a situation that requires professional expertise, don’t hesitate to reach out to Accurate Pool and Landscape. Our team of experts is always ready to assist, ensuring that your pool is well-cared for, no matter the season.

Thank you for following along with our guide to winterizing your inground pool. We hope you found it informative and helpful. Here’s to a cozy winter season, with the peace of mind that your pool is safe and sound, waiting to make a splash in the summer!