This standard for wrought copper and wrought copper alloy solder joint drainage fittings, designed for use with copper drainage tube, covers: (a)Description, (b)Pitch(slope), (c)Abbreviations for End Connections, (d)Sizes,and Method of Designating Openings for Reducing Fittings, (e)Marking, (f)Material, (g)Dimensions and Tolerances. 1.2 Units of measurement: U.S. customary units are the standard for conversion to metric SI units. See SI-1, ASME Orientation and Guide for Use of SI (Metric) units.