等徑直通equal coupling
異徑直通reducing coupling
內牙直通 female coupling
外牙直通 male coupling
90等徑彎頭 90 equal elbow
45等徑彎頭 45 equal elbow
外牙彎頭 male elbow
內牙彎頭 female elbow
等徑三通 equal tee
異徑三通 reducing tee
內牙三通female tee
外牙三通 male tee
管帽cap
透氣帽 vent Cap
檢查口 check
清掃口 clean out
管堵 pipe plug
順水四通cross
斜四通 double Y