For a second, I though they were referring to the trenchless piping method used on the sewer lateral. They pull a plastic pipe with a winch through a older pipe

For a second, I though they were referring to the trenchless piping method used on the sewer lateral. They pull a plastic pipe with a winch through a older pipe with a metal head that expands out the old pipe. Fortunately there are no fumes during this process.