You can use it two ways.
1. It can be connected to disable the valves as you describe.
2. It can be connected between Pin 8 on the Pi and ground. This allows The SIP interface to interact with the sensor.
1. It can be connected to disable the valves as you describe.
2. It can be connected between Pin 8 on the Pi and ground. This allows The SIP interface to interact with the sensor.