BrassCraft Safety+PLUS excess flow valves and connectors incorporate state-of-the-art technology with precision engineering, providing an advanced solution to homeowners that helps protect against gas-related fires and explosions. In the event of a gas-line rupture or disconnect, the valve automatically activates to restrict gas flow at the appliance. This immediate action helps avert a potential for a hazardous buildup of gas in the home. The valve remains activated until the gas line is properly repaired.