The utility model provides a plumbing fitting is with defeated device that draws in tow chain, including conveyer (1) and tractor (3), wherein, conveyer (1) is used for installing in tow chain (2), and conveyer (1) is provided with driven voller (12) including base (13) and drive arrangement on base (13), drive arrangement's bottom is provided with drive roll (11), drive arrangement's pterygoid lamina (14) and base (13) link to each other through the connecting piece is fixed, and drive roll (11) form clearance (18) that are used for pressing from both sides tight pipe fitting (4) with driven voller (12), rotate under drive arrangement's drive drive roll (11), and pipe fitting (4) surface between form drive pipe fitting (4) and stretch frictional force into, tractor (3) are used for being connected with the head end of pipe fitting (4) to traction force is applyed to the direction of stretching into to pipe fitting (4). The interior lower problem of pipe fitting installation effectiveness of present tow chain can be solved to above -mentioned scheme.