Abstract: A protection device for an irrigation system having at least one water line and at least one irrigation sprinkler head, the protection device comprising a protector body having a wall defining an interior cavity, a top rim, and a bottom rim with at least two groove pairs, wherein a first groove pair has a first groove profile, and a second groove pair has a second groove profile, the second groove profile being different from the first groove profile, an adapter cap having an outer rim surface, an annular ledge extending inward from the outer rim surface, a bottom surface, and a top surface, the adapter cap detachably connected to the protector body, a collar insert having an outer edge, an inner edge defining a center aperture, and a lower surface, the collar insert detachably connected to the adapter cap, and wherein the protector body is selectively ridingly engaged between a first riding engagement with the first pair of grooves and a second riding engagement with the second pair of grooves on at least on