Rain Bird residential valves come in two different models, with or without a flow control screw. This video shows how to adjust the flow control screw on a residential valve which has this feature. The flow control screw can be used to adjust the amount of water flowing through the valve. If there is excess water flowing to sprays it can cause spray misting, which is often blown by the wind to places it is not intended, and the water is wasted. This feature can help save water.

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