公称尺寸为3/16英寸至2英寸的旋压式排水龙头和地上截止阀的尺寸和试验要求。材料（主要是金属）、设计、部件尺寸和活接头端。交叉引用:BS 21BS 57BS 61BS 84BS 864:第2BS 864:第3BS 903:第A2BS 903:第A6BS 903:第A16BS 903:第A26BS 1004BS 1083BS 1224BS 1400BS 1449:第4BS 1737BS 1806BS 1972BS 2779BS 2871:第1BS 2872BS 2874BS 2879BS 3284BS 3457BS 3885BS 3964BS 4518DD 18ISO/R 228

Dimensions, test requirements for screw-down pattern draw-off taps and above-ground stopvalves 3/16 in to 2 in nominal sizes. Material (mainly metal), design, dimensions of components and union ends.Cross References:BS 21BS 57BS 61BS 84BS 864:Part 2BS 864:Part 3BS 903:Part A2BS 903:Part A6BS 903:Part A16BS 903:Part A26BS 1004BS 1083BS 1224BS 1400BS 1449:Part 4BS 1737BS 1806BS 1972BS 2779BS 2871:Part 1BS 2872BS 2874BS 2879BS 3284BS 3457BS 3885BS 3964BS 4518DD 18ISO/R 228