Union, Pipe Fitting Material Malleable Iron, Fitting Schedule/Class Class 300, Pipe Size - Pipe Fitting 3 in, Fitting Connection Type FNPT, Standards FM Approved, Meets ASME B 16.39, UL Listed, Max. Pressure 600 psi@150 Degrees F, Saturated Steam Pressure 230 psi @ 550 Degrees F, Hex Size 3 7/8 in, Temp. Range -20 Degrees to 550 Degrees F, Seat Material Brass. This item has been restricted from sale in the following state (s): []