Excessive water pressure can blow out tubing, fittings, and emitters and cause damage to your drip irrigation system. Keep your drip components in place by using a pressure regulator connected to your water source. The pressure regulator lowers the incoming water pressure and keeps it at a constant rate even when the water pressure varies. This pressure regulator is preset at 20 PSI, ideal for most drip systems, and has a 3/4 in. FPT inlet and outlet. Connects to sprinkler and drip irrigation systems. Made of high-impact acrylonitrile butadiene styrene (ABS) treated with UV inhibitors.