The clean out line beside my home was not correctly connected to the sewer line so I have had a problem with roots growing inside and causing clogging. I think that the sewer line may be cast iron. Not sure as of yet. I am digging down to the line and in a few days will know for sure. But if the line is cast iron what tool would you use to cut the pipe. Also, what would you use to connect the PVC to the cast iron? Would you use some type of rubber sleeve and hose clamps to hold the two pieces together?Thank you for any help that you may give me.Sincerely, Terry