Just connect ground and either open or close from your valve to the gorund wire and input1 or input 2 of the Implant. Once you install the device with the proper driver you will see actions like Open and Closed as choices for your code be it RM or WebCore. This device does need an external power supply though.
Follow the appropriate diagram to wire the Universal Relay according to your application. If you don't see a diagram describing your set-up, please contact us to request help with the installation. Contact US - The Smartest House
Sounds like the 12-24V Zen17 would work great for you.
Two isolated inputs to monitor the state of your valve.
And two outputs, one to control the valve and one for future consideration.
Maybe a heater or light.
I have the control part working fine. What stumps me is wiring the monitoring. The specs say that they are all dry contact but with no voltage how do you know if the switch is open or closed. Plus I'm not seeing anything in the device that shows if the switch is open or closed. I must be missing something. Maybe when the Zen17 comes in it will be clearer.
I have been able to make it work with the Zen17 but in my situation am not able to efficiently use the device since I need too many inputs and it winds up leaving many relays unused. What I'm really looking for is a device that just have inputs that can detect that a circuit is open or closed and better yet measure the voltage. It feels like I'm searching for the holy grail.