I have a roughed-in bathroom in the basement of my 1969 home. There is a 1.5" metal drain pipe coming through the slab. It is capped with a metal cap.
I am looking to install a bathtub and use this drain. However, due to the age of the home and the fact that it is metal pipe, I am concerned that the drain pipe may be corroded or leaking under the slab, which may be the reason there is no bathtub there to begin with (possibly the previous owner simply removed the tub rather than breaking up the slab and repairing the pipe).
What I want to know is, how can I test/inspect this drain pipe before installing the bathtub to make certain it is not leaking or clogged under the slab? Can I just pour some water in it and make sure it drains? Do I need someone to camera-snake it?
Thanks for your advice.