Current drought makes it a lot easier to spot places where a sprinkler system needs adjustment or cleaning, or where a planting is blocking the spray & needs a trim. Just walk around the house once a week or two & look for brown spots, as well as broken or missing heads as a result of our lawn folks. Won't identify every problem, but will prevent permanent damage to the lawn.
Most of the problems I've found are quick fixes, and green returns very quickly. I live in northern end of TV where sprinklers are on municipal water supply, so whole system filter would probably be overkill.
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