Is there any such product in existence that could alarm the homeowner of a potential break / leak in the system. One of our irrigation installs has had a drip valve stick open and another leak on two separarate occasions. That was like a month ago but I would like to give the customer a way to know if something is not working properly. It seems like the alarm could go off when there is water flowing through the main at a time when it shouldnt. Any such thing??