Seller did not disclose under-sized septic

[Ernie K.]

We recently purchased a 5-bedroom house in Seneca,SC as our first investment house. Our intent is to use the house hack strategy. Our son will live there when he attends Clemson University and we will rent the other 4 bedrooms to his friends.

During due diligence for the purchase of the house, we had a house inspection and a specific check for the septic system, which had no issues identified. After buying the house, however, we learned too late that the septic system is only sized for a 3 bedrooms house, instead of for 5 bedrooms. These are all 5 legal bedrooms with closets and egress, as listed.

This was a hard lesson learned for us. We were worried about the function of the septic and did not think to even ask if the sizing was appropriate for the house size. We need advice, please. Is there any legal course of action we should pursue? In the required SC disclosure, the Sellers did not list this issue. Thanks for any advice anyone can offer.