If I implemented a group, as you suggested. What would happen if I switched on the wall switch (to turn on the pump) to use one of the three water taps in the garden? Would all zones in the group follow and turn on as well?
The group setup I’am thinking you mean would be as follows(?):
Watering group:
Pump_Switch (z-wave)
Opensprinkler zone 1 etc.
Our pump has a pressure pump controller (turns of when pressure is high enough). It’s usually on, but having a wall switch gives me the opportunity to turn it of to prevent jokers from opening the garden water taps when I’m away.