I started out setting a new tub. Once I dry fit it and the drain didn't line up, I called the plumber. No desire to dig out the tar around the current trap and risk messing something up under the foundation. I did get the overflow to line up with the new location which took some serious thought about angles and may have set a record for number of elbows per inch...I did not, however, out of deference to the real plumber, glue it in place before he came...
Yeah I don't mess with shlt that can leak where I can't see. Sinks and toilets (for the most part) are in plain view if they are leaking. I don't 17 with bath tubs and showers.
I sold a house one time where I had added a bathroom in an area over the garage. The garage had drywall in the ceiling. Sewer and water line ran along one wall, as original builder had capped them in case anyone carried out this expanded bathroom. So I had the plumber connect to that sewer line, and instead of keeping all the pipes in the ceiling sheetrock and having to drill through all the beams, I told him to cut out some sheetrock and bring the pipes down an inch or two below the beams, and expose them to the garage. That way no structural integrity is compromised, and I can look up and see if I ever had leaks.
Well, the buyer went round and round about that. Home inspector said it wasn't code and we needed to drywall around it. Just total dubmasses. Many garages are completely exposed - the sheetrock is just for looks. Much better to be able to see your lines whenever possible.
Am I alone in this?