Draining and refilling your pool is a periodic maintenance task that refreshes water quality and reduces the buildup of dissolved solids, such as calcium and salts, which can’t be removed by filtration alone. This is typically done every 3–5 years, depending on water conditions and usage. Before draining, check local regulations regarding water disposal. Refill with clean water and rebalance all chemical levels to ensure safety and comfort. This process improves water clarity, enhances sanitizer effectiveness, and extends the life of pool surfaces and equipment. While it requires planning and time, a full drain and refill can significantly rejuvenate your pool’s performance and appearance.