A sprinkler (1) is designed to be stacked upon a like sprinkler (1). The sprinkler (1) includes a spray tube (2), a sled (3), a projection extending from either a top or bottom surface of the sled (3), and a recess formed at the top or bottom surface of the sled (3). The recess accommodates the projection extending from the sled (3) of the like sprinkler (1) so that the sprinkler (1) can be stacked with the like sprinkler (1).
