Conforming to ANSI Z21.93/CSA 6.30, Excess Flow Valve helps homeowners protect against gas related fires and explosions. Omni-directional unit has no parts that can wear, break, or misalign over time. Valve installs like standard gas fitting, activates automatically to restrict gas flow at appliance in event of gas line rupture or disconnect, and automatically resets after gas line is repaired.