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As winter approaches, deciding whether to drain your above-ground pool depends on several key factors, with climate and pool construction topping the list. In regions where temperatures regularly fall below freezing, leaving water in the pool can be risky. Water expands as it freezes, which may cause damage to the pool walls, liner, or plumbing if the pool isn’t properly winterized. Conversely, in milder climates where freezing is rare or brief, it’s often safer to keep the pool filled, thus avoiding the labor-intensive process of draining and refilling.

The materials used in your pool’s construction also influence this decision. For example, pools with sturdy metal frames and durable liners are often built to withstand seasonal freeze-thaw cycles better than some cheaper models. Knowing your pool manufacturer’s recommendations can be invaluable here.

Regarding water quality, stagnant water during winter can pose a risk for algae growth and chemical imbalances. However, thorough winterization strategies, including the use of winterizing chemicals, covering the pool with a high-quality winter cover, and maintaining a balanced chemical profile before closing, can minimize these issues. Draining the pool might seem like a straightforward solution, but it carries its own downsides. Removing all water stresses the pool structure, and refilling in spring can be costly and time-consuming.

Ultimately, weighing the pros and cons involves considering both immediate inconveniences and long-term pool integrity. If your area faces harsh winters and you are unable to properly winterize, partial draining combined with specialized winterizing plugs and covers may be prudent. In milder climates, keeping the pool filled and well-maintained over winter is often the better choice. Consulting local pool professionals familiar with regional conditions can help tailor the best strategy for your situation.