Continuing the discussion from Flow sensor low flow integration?:
I think there is an opportunity here to detect and shut off the water flow if a leak is detected. One way it could work is via a learning/monitor program. A user installs a flow sensor and tells the Rachio app enable shutoff if a leak is suspected. The Rachio monitors the next run of that sprinkler line and samples the flow measurement several times. This allows it to generate a range expected flow. Then when the system runs in the future Rachio compares the current flow to the expected range and if it exceeds it by a specified factor (determined by testing some real systems) then it shuts off the water and notifies the user.
One problem with flow meters is they are currently expensive. A single flow meter could be installed upstream of all the irrigation control valves and then the Rachio app could be told which flow meter belongs to which sprinkler lines. Of course if you have separate systems in the front and back yards this won’t work so well since you’d still need 2 flow meters.
Which brings up another suggestion. A flow meter integrated into an irrigation control valve would bring the cost down. I don’t know if Rachio has approached any of the companies about producing such a model but it might be a conversation worth having.