I have a Hunter Professional Series G-Type Adj. Arc that only pops up a couple of inches out of the ground. It was probably fine until the previous owners installed a rock wall in front of it. Now a section of the grass does not get any water and the rock wall creates some flooding in front of it. How could get this sprinkler head to pop up about a foot? Will I have to dig the current sprinkler head deeper and install a riser to accomplish this? Thanks from a new homeowner!