Lead Free Brass Pipe Fitting, Union, Class 125, 3/4" NPT Female Union for connecting and extending two pipes Female National Pipe Taper (NPT) threads on both ends for connecting two male threaded pipes Made from lead-free brass for higher corrosion resistance than steel Relative softness of metal enables tighter seals and greater ease in installation Meets standard ASTM B-584-06 for lead-free quality assurance