Greenlee 616 Piston for 3-1/2 Conduit - IMC, Rigid

To use the Greenlee 616 piston, first choose the right one for your 3 - 1/2 inch conduit according to the color - coded end disk with size markings. Then, connect it to your blower or vacuum power fishing system. The flexible foam body will create an air - tight seal as you guide the line through the conduit. Make sure to handle the strong steel center rod carefully to avoid any damage. When not in use, store it in a dry place to prevent rusting. If you notice any signs of wear on the foam body, it's time to replace the piston.