I have an 80 year old home with the original 4"cast iron pipe which is cracked and has holes. To fix my problem the traditional way would mean major demolition of my backyard. I would like to know if anyone knows if the new technology of trenchless epoxy relining of pipes is a good way to go. I have already had one quote from a company called NuFlow in San Diego, CA and they are very expensive however if their technology works, it would save me destroying my yard. If anyone has any pros and cons concerning this subject, I would greatly appreciate it!!