... . 3.DIN,SMS,ISO,IDF,AS,BS,BPE Standard.Sanitary union (ISO9001:2000,CE,TUV certified) Specification ... reducer,sight glass,manhole cover,cleaning ball,centrifugal pump,pipe holder etc...Advantage: Prompt quotation, competitive price, ... China,specializes in producing kinds of sanitary valves,pipe fittings as well as OEM services over 15 years. ... on. Stainless steel sanitary union sanitary pipe fittings