ELIMINATES THE NEED TO DRAIN WATER WHEN WINTERIZING YOUR IN-GROUND SWIMMING POOL! This pool valve prevents water from entering the return lines with a unique one-way valve system. Simply replace your current “eyeball” return fitting with this valve when winterizing, drain the water from the lines, fill with antifreeze and water is prevented from re-entering the lines. Also allows you to blow air through the return lines with the one-way winter valve installed. Winterizing valve can be installed without ever having to drain your pool!
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