House inspection shows belly in pipe

[Jinx1978]

Just had housing inspection completed and it shows belly in pipe. It looks very short and my husband thinks it probably broken at the joint rather than a belly. We talked to a plumber this morning and he watched the video and said it could possibly cost up to 15k to fix as all the utilities are underground in our area. But also said it might never be a problem. But a 15k problem we would rather avoid. Would like some advise, here is the inspection scope video.
03/14

 

[James Henry]

Basically all drainage pipes have a belly somewhere in the line, there are rarely never any perfect draining pipes, it all depends on how bad the belly is. 1. Have a plumber look at your toilets and tell him you want them to flush as much water as possible. 2. Don't ever throw anything other than toilet paper in the toilet. 3. If you have to have the drain snaked every few months then the belly needs to be addressed.

 

[Sponsor]

 

[Sylvan]

There is no need to even think of having the belly removed or worrying bout slight back pitched waste line.

If your really concerned buy a used cable machine and snake the line yearly