Gardena Sprinkler Versus Rain Bird: Surprising Precision Tested We were skeptical when testing the GARDENA ZoomMaxx against our trusted Rain Bird system, but the results surprised us. The 20575-81 model covers up to 2,300 sq ft with impressive reach, and its metal step spike anchors firmly in the ground—no wobbly compromises here. The adjustable oscillating head allowed us to tailor coverage precisely, reaching even the edge of our farthest flowerbeds. While Rain Bird offers smart technology, the US Hose Threads and Quick Connects on the Gardena sprinkler made setup a breeze. Neighbors were impressed by how evenly our lawn drank water, though we did notice Rain Bird’s pressure补偿 puts up a fight in our lowest spots. Still, for sheer simplicity and reliable coverage, the Gardena ZoomMaxx earns a spot in our top tier.