Replacing toilet in the gf's new house. Only thing holding it down was gravity. There is no flange at all. Just an open pipe and Lots of what looks like grout to seal it. Is that normal here?
Also in both bathrooms, all fixtures, a ton of black sludge in all pipes , much of it hardened in the end of the pipe restricting flow. Not too familiar with thai plumbing but wondering if it's worth redoing all the pipes. Probably not good for the recently installed RO system.