I don't think I can count high enough to count the number of drum traps that are entirely encased in concrete in Chicago high rises that would cost thousands of dollars to replace because they have been tiled over with marble, slate, or granite tile.This is my own opinion. I don't expect anyone to agree with what I say about this.
Drum and bottle traps are non existent here, but when and if I do find one, it's all about replacement, find it, get rid of it, find a vent to clear it out at, I have never had an issue with a drain, even on a lav, if the trap is in good shape, I could walk the 1/4" cable around it and open line without ever pulling the trap. All I have to say about this device, to force a line open via pressure, is it won't stay open for long, it will clog back up in no time. It is just not the right way to do it.