hello guys. i have been working at the plumming for a number of munths now. i am doing lots of gud work and money. i have lots of tools and thinking of a van. I have a quesstion. i am very much in favour of white plastic pipe. i use it lots. i was talking with a man in the place wher i buy my pipe and he spoke of "insets" for use on the white plastic pipe. i was confused a little bit and do not think that the man was explainig clearly. can anyone here please explain to me what these "insets" cuold be. thanking you.
