Bought A House, Completely Hosed Because It’s Not Up To Code.

This is in Portsmouth VA USA.

I closed on a home last July - no warnings from the seller about anything, and the inspection came back perfectly clean. Since then I’ve spent at least 10k replacing the AC condenser, and fixing clogs in my plumbing. I was just told by another master plumber that the entire plumbing system is completely hosed - the sewer line is corroded and leaking, fungus under the house, junctions and pipe runs aren’t even close to being up to code. Clearly an unlicensed amateur. He told me that there’s a 0% chance that the plumber who did it was licensed or even apprenticed anywhere, and there’s no chance the inspection was done properly. I’m getting a second opinion from another master tomorrow, but my point stands.

Do I have any legal recourse here? This is going to be a minimum $6k fix, probably more from what this plumber is saying. Virginia is technically a buyer beware state, but from what I understand about the codes, stuff like this is supposed to be disclosed. Who can I sue to get my money back?