Do tubing sizes telescope?

Do some or all of the tubing sizes fit inside each other fairly tightly?

audreyobscura4 months ago

They do telescope, but it is not a fit with a tight tolerance. The pipes will slide willy-nilly. I tried to DIY a connector in a pinch, trying to connect two pieces of 1/2" pipe in a MacGyvered 3/4" pipe, and the solvent cement couldn't mate with the inner pipe.