Rain Bird JH000031 1-1/2" x 12" Swing Joint ACME Inlet to NPT Outlet - Rain Bird Swing Joints are designed to deliver the performance you expect while saving you money with their superior flow characteristics and excellent structural integrity. Available in a wide range of configurations, Rain Bird Swing Joints are the perfect complement to our golf series rotors. An innovative swept elbow design reduces pressure loss by up to 50 percent over other swing joints.