Business Sale

Hey everybody. I bought a business summer of this year, we agreed to 12 monthly payments of $5000 totaling up to 60,000 over the course of a year. The business is a restaurant. I did not buy the building. We bought out the lease and equipment, essentially “fixtures and fittings”. While we were in the middle of the process, I asked the seller if everything was OK with the building as far as grease trap and just general maintenance. I have it in text writing that he said everything is OK and good to go. After the contract is signed I come to find out that the building needs a full size grease trap put in, and that the environmental department for the city had been pursuing this with the seller for about 6 to 9 months prior. He did not disclose this to me. So I was stuck with having to install a $19,000 grease strap two months after we opened. Can I sue him for this money since he failed to do his due diligence and disclose it?