Anderson Metals Brass Pipe Fitting, Reducing Coupling, 1/4" x 1/2" Female Pipe Reducing coupling for connecting two pipes with different diameters Female National Pipe Taper (NPT) threads for connecting to male threaded pipes Brass for corrosion resistance, ductility at high temperatures, and low magnetic permeability Operating temperatures range from -53 to 121 degrees C (-65 to 250 degrees F) Meets specifications ASTM B584 and ASME/ANSI B16 for quality assurance These fittings contain lead and are not allowed by federal law to be installed for potable water use in the U.S.A. and its territories.