I took a look at Vera Scenes, and despite not having the flow meter installed or integrated into my Vera system, it appears that I could develop a scene in which if the flow meter had water flowing continuously for 30 minutes, it could then send a message to an automated shut off valve to shut off the water. This would be done using the manual mode in the Triggering menu on scene development. Thanks for all for the help here. I will almost certainly go ahead and purchase the flow meter and water valve from Fortrezz and try to set those up next month. I will report back as to how all of this goes.