I have a shower stall that is leaking through the ceiling into the kitchen below. I have poured water from a one gallon water can directly into the shower stall drain pipe and the leak occurs when I do that. Based on the results of that test I don't believe the leak is from any leaky gasket at the shower pan drain or bad grout around the edge but a leak in the drain pipe it self and most likely in the drain trap section.
Does this sound like a reasonable assumption?
My next step would be to remove a piece of the ceiling below the shower in the kitchen. Depending what I find, I will either attempt a fix myself or call a plumber. I have replaced traps in a kitchen sink but don't know if that's doable in shower stall plumbing.
Any suggestions would be greatly appreciated.