High water pressure from the water source can wreak havoc on your drip irrigation system. Excessive pressure can put enormous strain on drip components and pop off tubing, fittings, and emitters. To keep your system in place, use a pressure regulator to lower incoming water pressure and keep the flow at a steady rate. This pressure regulator is preset to a range of 15-20 PSI and has a 3/4 in. FPT inlet and outlet. Works with sprinkler or drip irrigation systems. No more flying fittings or emitters! The pressure regulator is made of high-impact acrylonitrile butadiene styrene (ABS) treated with UV inhibitors.