Found plumbing issue right after I found townhome

[Nima Lama]

Hi BP Team , Is there any window for the buyer to go back to Seller if any major issue is identified in the house but was not identified during the inspection ? I bought this house on September 2017 and seller was living in the house until Dec 24th 2017 as extended lease because they wanted some time to find a new house for themselves . My new tenant moved in on Jan 5th and they noticed small part of carpet was wet . I had my plumber look at it and he said its because drain coming out of washer is not big enough to hold the water which is causing the leak . Now he needs to cut the wall and increase the drain size . I am waiting on a estimate there but it sounds like I might be looking some good amount . Do I still have time to go back to the Seller and try negotiate if they can fix it for me ? Thanks Nima