Here’s one for ya. Son moved in to father in law’s house built in 1965. Son was complaining that the bath tub wasn’t draining. We tried snakes of all types. Draino of all types. It would take a day to drain the water from 1 shower. Went there today armed to the teeth I was going to fix this if I had to replace the pipe from tub to sewer outlet. Long story short cut hole in drywall and was going to take pipe apart at the unions. My son took the over flow off and the tub drained. Turns out the handle on the over flow was the remote drain plug. It was seconds before I was going to cut pipes apart and replumb it. F… did we laugh, never saw one of those ever.