Re: SEWER LINE REPLACEMENT help..
As others have said, lining is not an option if the pipe does not have a constant downhill slope.
Traditional replacement methods involve trenching. In some cases, you may have to disturb existing pavement, concrete, landscaping, or other structures, and that gets horribly expensive. A possible alternative to trenching is directional boring: think of a horizontal well-drilling rig. Only a small entry and exit trench are needed; the directional bore can go under everything else.
Directional boring is typically more expensive than trenching if you're going across an open area. It can end up being cheaper if there is a bunch of other stuff in the way that must be replaced.
The "Senior Member" designation under my name doesn't mean I know a lot, it just means I talk a lot.I've been a DIYer since I was 12 (thanks, Dad!). I have read several books on various home improvement topics. I do not have any current code books I can refer to. I was an apprentice plumber for two years.