Let's face it...you know when it's raining, so why can't your sprinkler system shut off in a downpour? It would, if it had the FREE rain/sprinkler shut-off!
There's nothing more wasteful or costly - than an irrigation system that runs when it doesn't have to…in the rain. It's the simplest, most effective way to prevent your sprinklers from coming on during or after precipitation. Easily installed on any automatic irrigation system, it will shut sprinklers off in a storm and keeps them off, automatically compensating for the amount of rainfall that occurred. Disks absorb water and then expand proportionally to the amount of rain that fell (e.g., a small cloudburst would result in little absorption, a thunderstorm with 6" of rain would lead to more absorption and thus more expansion). As the moisture-laden disks expand, they eventually activate a switch that interrupts the circuit from the controller to the solenoid valves. Once dry, they contract and release the switch. It automatically resets without ever affecting your controller. Built to withstand the harshest conditions, there's no better way to ensure that your system isn't watering when it isn't necessary.
One of our neighbors has already installed his, and it is operational. I believe it comes with all the instructions.
Select the favorite link below for Austin Water Conservation web site and find "...don't water when it pours Rain Shut-Off" It is a PDF to download.