The answer to 'how to maintain sprinkler system' is to perform regular inspections, adjustments, and preventative maintenance on your sprinkler system. This includes checking for leaks, ensuring proper coverage and timing, and winterizing the system before cold weather arrives.
Start by inspecting your sprinkler heads and valves for any damage or clogging. Check that each head is properly aligned and delivering water evenly across your lawn and landscaping. Adjust the spray patterns as needed to avoid over-watering or dry spots. You should also inspect the backflow preventer, control panel, and any other components to ensure they are functioning correctly.