Re: new technology to fix clogged sewer pipe?
$1300 seems a bit steep for a sewer inspection. I would think it to be around $300 (somewhat wild guess). Get a few more estimates. Also check with disaster restoration companies; quite often they have the equipment and skills to inspect sewer lines and can be cheaper than plumbers.
If a line is sagging, I fail to understand how shoving a new pipe through will fix the sag. That would only provide a fix if the pipe is cracked, not sagged.
There are two ways to fix a sagged pipe: trenching or directional bore. The directional bore is typically more expensive, and may or may not be feasible in your situation. The directional bore means you don't have to dig up your yard; if you have a lot of concrete or decorative elements the directional bore might actually be cheaper than trenching.
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.