As with the "Dancing" fountain nozzle, the theory behind the operation of this rotating nozzle is based on the water wheel. Using only water pressure, a continuous effect of movement is created without additional mechanical or electrical devices. No movement is necessary to generate this watery swaying motion. A swaying motion that brings to mind mesmerizing Arab belly dancing. The dancing rotating nozzle turns water into a harmonious and rhythmical dance which, along with its gentle murmuring, relaxes the senses rotating crab claw orchid sprinkler head is also known as the fengshui car. The nozzle is propelled by the jet force of the water, which turns the nozzle at 45 degrees and is shaped like a crab claw. The sprinkler installation is 45 degrees to the surface of the water.