My automatic watering system won't shut off. The water keeps running through the sprinklers or the emitters keep dripping.
Turn the controller to the “rain” or “off” position.
Close the manually operated shut-off valve to the irrigation system. This could be your backflow preventor or some other brass valve. In Tucson these valves are generally above ground often placed near where the water enters the house.
Ninety percent of the time, the reason the water does not stop flowing out of a sprinkler or emitter is because the automatic valve that controls the flow to these outlets is partially or fully stuck open. Contaminates including rocks, rust (after a freeze) and other debris inhibit the valve’s ability to fully close.
Clean or replace the automatic valve.
My automatic watering system no longer waters.
Verify your controller has electrical power. Some controllers will still show a display and even accept a program without electrical power. Many controllers are plugged into outdoor electrical recepticles which are easily tripped during wet weather. So verify your controller has power.
Make sure someone has not shut off the water supply to the irrigation system. It happens all the time.
Check for pack-rat activity in the valve box. Rats love to chew through wiring in valve boxes.
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