The guy down the street framed in his whole basement, he wants me to set the toilet and what not. I know the area real well, and I know that those floor drains are actually connected into the gutter drain system. They are not trapped in the floor and meet up with the sewer drain at some point. I pulled up his duct tape over the "toilet flange hole" and as expected no smell of sewer gas. I told him that I will not hook up a toilet to that line. He got a little upset because he said he ran a hose down it for 20 minutes with no problem. So It should work for his toilet. I am just not going to hook a toilet to that line. I told him I would look into it, I also told him like 5 years ago that is a storm drain and has no trap, can not be used for a toilet. Would you hook a toilet up to a storm drain?