Is it possible to hold seller of property for expensive/undisclosed sewer line repair?

I purchased my property on January 7th 2022. I did not move in until January 27th 2022. On February 12, 2022 (two wks later) I saw sewage backup in my unfinished basement behind the washing machine. Roto-Rooter came out and snaked the line and ran a camera through the line. Their camera person would not give me a copy of the camera view unless I paid him an additional $795 over the $750 that I had already paid. I refused the additional payment and therefor was not provided the camera view or pictures. However, what he stated and wrote was that there was a big belly in the line, and it would cost me $16,100 for repair. Needless to say, I am not going with Roto-Rooter. I have paid for another company to come out and paid an additional $250 for the camera view. This company quoted $10,000-$12,000 barring any unforeseen issues. I am in the process of getting a 2nd and 3rd estimate. Are the previous homeowners in any way liable for this expensive/undisclosed issue?