When the pressure’s on, save water and money with Rain Bird® 1800® Series Sprays featuring PRS with Flow Optimizer™ technology. These Spray Heads are ideal for use in areas with high and/or widely fluctuating water pressures. The patented PRS pressure regulator built into the stem can help you save approximately one gallon per minute per spray. It also helps to end misting and fogging caused by excessively high water pressure.