thats what i did as soon as i saw there was writing. I said PLASTIC ODDITIES INC. scrolling through the products they have, I think its the top to a backwater valve.
I started peeling up the vinyl floor in the 1/2 bath in my basement. Its concrete underneath but as i continued i found a portion of the floor that was wood. Its about an 8 inch square. the wood was taped in place and supported by a piece of 2x4. I pulled it out and about a foot down the hole...