Flip Home from Hell - Seeking Advice

[Jack Saunders]

I flipped a home and sold it a couple of months ago.  Everything was permitted correctly and done by the book.  The buyer has had issues with the toilet gurgling when flushing.  The home has all new plumbing and the plumber went back to check everything and stated the septic line must be clogged.  I bought the home as is but a new septic system was installed in 2019, I have the county record on it.   The new owner had it checked out and it ended up being the septic line from the tank to the house was never done 🙄.  The fix was 6k in repairs, they called the county as the septic was passed based on permit.  Now the county is threatening to take the General Contractor license unless the money is reimbursed 😳!  

Has anyone dealt with kind of issue?  I don't think it's worth trying to sue the county over 6k, it may cost more in legal fees.

This was my first flip and it has been a school of hard knocks. 

TYIA