[bgill]

What kind of bucket would you use that could fit in a 4, 5 or 6” dia. pipe?

Use a small plastic container and some string. Takes a while but does the trick.

FYI, this method doesn't work in trying to get a frog out of the well because frogs don't cooperate.

[Kartographer]

I can’t think of any bucket that you could easily find/buy that would hold as much as a 3’ long 3” in dia. pipe.