Most drain jobs I can knock out without thinking twice now. But then I get called to a collapsed line under a slab, or something so backed up and foul I don't know where to start, and it tests everything I've got. I stand there covered in it, trying to figure out a job that's way past the routine stuff.
More people experience this than they realize.
You can handle routine drain work, but the collapsed lines and nastiest jobs still test you.
If this sounds familiar, the Library can help you find the bigger picture.