Sprinkler heads not popping up all the way? Unfortunately, this is something that can go unnoticed as the systems run at night. The sprinkler heads will just spew water within the immediate area, causing “hot spots” within the lawn. Whether it be by mowing or thick grass, these are a couple of common reasons why they are not popping out of the ground properly. As part of maintenance, it’s important to check the height of the heads and to lift the head of the nozzle up with a little shovel. This will help the full body of the nozzle to come up and spray a lot further.