Everflow Supplies NPBR1000 Close Brass Nipple Pipe Fitting with 1" Nominal Diameter and NPT Ends Everflow part number NPBR1000 Brass 1-1/2" long nipple and no space between threaded ends 1" Nominal pipe diameter with male threaded NPT ends Conforms to ASTM B687 ans ASME B1.20.1 Meets or exceeds all applicable ANSI standards