How to Mow Over a Sprinkler

Note the locations of each of the sprinklers on your lawn. Because many sprinkler systems have sprinkler heads that descend into the ground when not in use, turn on the system to elevate the heads. This way, you'll know exactly where each one is located. Turn off the system before mowing the lawn.

Pass your lawnmower over each sprinkler head when the mower is not running. This way, the spinning blade will not damage the sprinkler head if the two come into contact. If the mower passes freely over a sprinkler head, note that it's safe to mow over. If the blade comes in contact with the head, note that you'll need to trim around the head.

Mow the lawn as per normal, passing the lawnmower directly over the sprinkler heads that are low enough to not interfere with the mower's blade. When finished, you might have one or more sprinkler heads that need further attention.

Trim the grass around the extra sprinkler heads with a lawn trimmer or a pair of garden shears. Cut the grass as closely as you can to each sprinkler head without hitting it.