1.union connector 2.material:PPR 3.Cavity:Single/multi 4. reasonable ... following is the thread sample.The followin is the socket sample.Go to our sample room: http://www. ... elbow, coupling, tee, reduce, cap, union, flange, flexible connector, water supply and sewerage pipe fitting moulds, etc. made ... PE-RT, POM and other material. Form as thread, socket, male, female, etc.4. We devote to be your ...