When ice forms, the Skim-Insure takes the pressure so your skimmer doesn’t crack. Plastic Skim-Insure simply screws into your skimmer line to protect plumbing from freezing. For above ground Skim-Insure, screw in after lowering the water level in your pool for winter closing – fits 1.5 in. skimmers. For in-ground Skim-Insure, screw in after filling your lines with anti-freeze – fits 1.5 or 2 in. skimmers.
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