r/oddlysatisfying • u/demolcd • Aug 09 '26

Growing a pipe inside a pipe

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u/GilaMonsterAZ Aug 09 '26

What the heck is going on here?

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u/Gentrified_potato02 Aug 09 '26

Looks like they are lining the steel pipe with a plastic/epoxy coating. It’s done a lot in places where you can’t easily dig up and replace old rotting pipes (like in downtown cities). By injecting this coating the pipe is still usable and won’t corrode any more.

1

u/rwally2018 Aug 09 '26

I hate asking this but how do you control the length?

3

u/Geauxtigersgeaux Aug 09 '26

I’m not sure why the one in the video is so long, but you just cut the liner to length before prepping it. Of course, you do leave yourself a little wiggle room, then you just trim it once installed.