This push-fit add on to Gardena Microdrip spray nozzles helps direct the spray in the direction desired. I italled an automated irrigation system in an indoor orchid wall. Therefore water may not exit the designated area. When I turn the pump on, water pressure starts to builds up. Until the desired pressure is reached, the nozzles tend to create a sideways spray. When turning off, water continues to drip for a bit from the nozzle head. This spray guard helps me to keep the water, where I want it to be :-)