If that's black iron threaded pipe and a 90 there, get rid of it, too.
U shaped copper configuration
First time posting - Doing a toilet replacment and was considering replacing the old straight chrome water line that comes up through the floor that then connects with a flex line to the toilet. I traced back to the copper in the basement and saw the shut off valve, but also a U shaped copper configuration. Does this serve a purpose? I was considering re-piping that area but was just going to use a straight 90 from the line to head up through the floor to the bathroom. Picture attached if I did this right.
