GRD-GBR1 GUARDIAN BRIDGEPN GRD GBR1 * The Guardian Bridge allows any security or Z Wave automation system to interface with the Guardian ecosystem. The Bridge communicates wirelessly with the Guardian Valve controller (GVC1) and provides control and feedback to the connected 3rd party system using Z Wave and or hardwire connection. When paired with the Z Wave controller, the bridge allows for open close control of the valve and provides notification if water is detected by