Is it not just a heat gun with a shaped nose? It’ll soften and expand the pipe slightly before fitting them together, where they’ll cool and constrict into place
Heat guns are also used to make plastics such as PVC piping pliable for the purposes of bending
Is it not just a heat gun with a shaped nose? It’ll soften and expand the pipe slightly before fitting them together, where they’ll cool and constrict into place
https://en.wikipedia.org/wiki/Heat_gun