Defines the dimensional and design characteristics of 1/2 and 3/4 nominal size draw-off taps. Relates to following types of tap, pillar and bib taps, combination tap assemblies, single hole combination tap assemblies, three hole combination tap assemblies. Includes sections on backnuts, body flanges, seating, head installations, obturators, seating washer, access to spindle seals, operating members, waterway, special purpose outlets, lockshields, integral restrictors, inlets, aerators and flow straighteners, 'O' rings and locating feature.