Parker Brass Pipe Fitting, 90 Degree Street Elbow, 1/4" NPT Male X 1/2" NPT Female 90-degree street elbow for changing flow direction Male National Pipe Taper (NPT) threads on one end and female NPT threads on the other for eliminating the need for an adapter Made from brass for higher corrosion resistance than steel National Pipe Taper (NPT) threads for creating tighter seals than straight threads More economical than steel