Double chamber water tubes wont roll like single-chamber alternatives.
Another benefit of double-chamber tubes is that if one side becomes punctured, there is still enough weight from the other chamber to hold your cover down -- no rush to replace a water tube in cold weather.
These vinyl bags are up to 35% heavier than other versions on the market, and yield significantly more strength and puncture-resistance.
No-leak valves make the water bags easy to fill with a garden hose. (Do not fill more than half-way to allow for freeze expansion.)
*Note: Only Available in Quantities of 10 tubes.