These double chamber water tubes are better able to stay securely in place and won’t roll like single-chamber alternatives. An added benefit is that if one side becomes punctured, there is still enough weight from the other chamber to hold your cover down. These vinyl water tubes are up to 35% heavier than other versions on the market and yield significantly more strength and puncture-resistance. Each double chamber water tube features a no-leak valve and is easy to fill using a standard garden hose. Sold in a 6 pack, each tube is 8 feet long and features dual water chambers.