... .SDR9 to SDR11 4.For gas supply PE ball valve1.pe80/pe100 fitting,gas pipe fittings, ball valve2.plastic pipe fitting,HDPE/MDPE3 ... .PE coupler,tee,elbow,reducer,cap end,stub end ... /SDR13.6/SDR17/SDR21/SDR26for more detail,please contact me. pe ball valve(with a single)