The number one most important part of conducting an inspection for necessary lawn sprinkler repair is to determine if the system is watering the lawn and flowerbeds correctly. A skilled technician is the best person to do the job, as they are trained to look for and detect subtle details that the untrained eye might miss. In addition, for the majority of the time, a trained technician can fix any problems they find at the time of discovery. In Texas, it is also the state law that all watering systems have a backflow prevention device in working condition. Backflow prevention devices stop the sprinkler systems from taking water from your flowerbeds or yard and siphoning it into drinking water supplies. Without a properly working backflow device, the drinking water could become contaminated.