Hi all, I have a blocked kitchen waste pipe (shared by the sink, dishwasher and washing machine). Water was leaking out underneath the cabinet at the concrete floor level. I have dismantled the cabinet and PVC waste pipes down to the hole in the concrete floor. The PVC pipe just came straight out of the hole in the concrete. What is going on here? Is it safe to rod it or has the pipe disconnected from something under the concrete? Please see picture attached for the hole that is left.