8 ft. Blue Single-Chamber Extra Heavy-Duty Water Tubes for In-Ground Pool Covers (5-Pack)

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.