It's a 45 year old house (2 story + basement) with original cast iron plumbing. We purchased it just over a year ago and moved in about 7 months ago after doing extensive renovations.
Upstairs and kitchen drains were replaced with PVC along with upper half of the main stack. Plumbing in the basement is all original cast iron.
A few days ago the main line clogged up (for the first time in 7 months) somewhere below the main floor but above the basement drains (basement toilet, shower, sink and a floor drain were draining fine, kitchen and above - not draining at all)
After unsuccessfully trying to unclog the drain myself with a manual 25ft snake (not long enough), called a local major plumbing company. They were able to break the clog with a 30ft snake going from a second floor toilet.
As a follow-up to this service, they sent a tech with a camera today.
The only things he could see, that there is some water standing in the horizontal section of the main drain in the basement floor and that the camera would not go further. He said this is an indication of some sort of damage to the drain line, and recommended ripping up the concrete basement floor and replacing a horizontal section of the pipe.
I have 3 questions for the forum:
*Is this typical for a camera inspection to give so few specifics?
*If so, is this really an indication of a serious problem?
*If a section of cast iron rusted-through under the concrete in the basement, wouldn't remaining piping be in a similar shape? Should all of it under the basement floor be re-done to avoid ripping up the floor repeatedly in the future?