Not mine. Customer complaint was clog. I started with the standard "how long has it been since you cleaned it?" Didn't know. Fortunately, the stack already had been cut and had a connector on it, so I just removed that and snaked it. Hair clogs where the trap and extension met the stack, of course. Drain was still slow, so I tried to remove the trap for examination. Apparently one of those "tub re-fit" places had done this one in the past, and they use Schedule 40 glue-together instead of compression fit shit like I prefer because you can actually take it apart and clean it. So I poked at what I could get at first, there was caked-on yellowish gunk all over the inlet to the drain, and it flaked off like you get when you boil waiter away a lot. Standard test for me is to put some in bleach, you get chloramine and yeah, it's caked urea. I was able to force a snake down through it finally and got it to drain well enough, snake came back with a mixture of sludge and this caked urea crap. Nasty shit, smells like ass. As far as I know, they use it at least 2-3 times a day, multiple showers. I've also had to phosphoric acid the watered urinals at my employer to get the build-up out of them. They don't give me a snake, so I use what I got.