Pool Supplies Ontario, Canada | Fiberglass swimming pools & spas

As the leaves turn and the Canadian air takes on that familiar autumn chill, every pool owner knows what time it is: winterization. While draining and covering your pool is standard practice, one of the most critical steps to protect your investment—and avoid an expensive repair next spring—is properly preparing your pool sand filter. In Canada, freezing temperatures are not a possibility; they are a certainty. Water left inside the filter tank, valves, or plumbing can expand when frozen, leading to cracks in the plastic or fiberglass components. Here is your essential, step-by-step guide to winterizing your pool sand filter and ensuring a smooth start-up next season! Why Proper Winterization is Non-Negotiable A sand filter is built to handle high pressure, but it is not built to handle the immense force of expanding ice. A cracked filter tank or a broken multi-port valve will require a costly replacement, turning your exciting spring opening into a frustrating and expensive delay. T...