WAGS safety valve
The WAGS Valve is a 100% mechanical water-heater safety valve. It needs no electricity, no batteries and no maintenance. It provides protection against water-heater flood damage and gives professional installers and property owners peace of mind, WAGS says. The valve closes off the cold-water supply line, insuring the installation against future flooding damage. It is small on shelf space and big on easy-to-sell, the company adds.