Moondog55

I just watched a video of a machine that blew what looks like expanding foam into an old cast iron sewer pipe. It came out flexible at the other end but was hollow, and at some point became solid - Cured in place pipe (CIPP). Fascinating. https://www.youtube.com/watch?v=VWTkPcW442M Is this how it's done here? Our old terra cotta pipes are in deplorable condition, full of tree roots and we may need to have this done at some point soon. It's actually the only major maintenance work...