I have some sections of 2" PVC and some Tee fittings that I need to join. On the Tee fittings, the main line is threaded and the outlets are smooth. How can I cut the threads in the straight sections to join with the threaded main line?
I see no reason why you should cut threads on a PVC pipe. It seems to me that this would be unnecessarily difficult and would weaken the pipe.
You should, instead, get a slip to thread adapter and glue it onto the pipe to thread it wherever you like. Any big-box hardware store or irrigation department should be able to provide this adapter.
Need to thread PVC? Use schedule 80.
Schedule 40 PVC pipe is for socket fittings (slip glue) only; threading is not a recommended practice.
Schedule 80 PVC pipe can be threaded.