How do I pur inside/outside threads on pvc pipe?
Your best bet is just buying threaded connectors and cementing them into the pipe.
If you really want to put threads on the outside of the pipe itself, I think you could do it with a wood threading kit? What size thread do you need?
I dont think you could with a metal pipe threading tool because the PVC is so much softer than metal, but then again, I've never tried.
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I thread 1/2 " PVC all the time. I use plumber's dies take it very slowly backing off frequently to prevent the dies from getting clogged. Works well. Use teflon tape to assemble.
Plastic burns left from sawing can cause trouble. Outside the pipe they'll interfere with a good fit. On the inside they can collect and slow the water flow. You can remove them with a file or pocketknife, but sandpaper is easier to use and works great.
You can't thread sch 40(white) pvc. The walls of the pipe are too thin for threading.. I do thread sch 80 pvc (dark gray) the wall are thicker . You are limited to types of threads , npt (NATIONAL pipe thread) threads are tapered used in plumbing , in the US. Straight pipe threads have no taper .. more commonly used in electrical industry.. I don't use Teflon tape on plastic threads, will strip threads or crack the fitting, you screwing into. I use pipe joint compound compatible with plastic.. tells you on the can what types of material pipe joint compound is suitable for.. the dies to cut threads are expensive.