Seller disclosure fraud

[Nolan Connor]

This past Friday I closed on my first rental property. After all documents were signed the seller told me to not flush toilet paper down the toilet bc it backs up and she doesn’t want what happened to her to happen to me. My realtor kind of shrugged it off and said it’s not that uncommon in the area (PA, lower income area, old homes). So we left, all documents had already been signed. It didn’t sit well with me so today I had a plumber take a look and they quoted me $14,500 because pipes need replacing. Getting a second quote tomorrow. On the sellers disclosure the seller marked “no” to any sewage issues. What recourse do I have here? What’s my best next step? 

Thanks for all the help in advance