On Thursday, January 30, 2020 at 12:16:47 PM UTC-5, Klay Anderson wrote:
So--I've a tap and die set for plastic pipe (think sprinkler system). Any ideas for the best lube for threading same? Dry alone snaps the pipe. I think petroleum products will attack the plastic. Silicone?

I don't know what is "best," but last time I did this I used dish soap and it worked.