Pool Mate Pool Cover Water Bags

8 foot single chamber 20 Gauge water tubes are constructed of extra heavy 20 Gauge, puncture resistant vinyl. All of our water tubes have a conveniently placed, leak-proof valve that is easy to fill with a garden hose. Water tubes keep your pool cover in place all winter long. Water tubes should be filled half-way to prevent popping caused by expansion if the water freezes.   10-Pack Blue 8 ft. Single Chamber 20 Gauge Pool Cover Water Bags Extra Heavy-Duty 20 Gauge Vinyl Construction - 65% Heavier Than Industry-Standard Single Chamber Design For Easy Filling Prevents Winter Pool Cover From Falling Into Pool Fill Halfway With Water to Allow For Ice Expansion - If you have trouble closing the valve please use a hair dryer to loosen before closing. Shipping Note: Shipping to Alaska, Hawaii, PO Boxes, and APO addresses is not available for this item Warranty: 90 Day Woot Limited Warranty