What fuel drain are you talking about other than the wing sumps and the strainer next to the oil filler neck? Is there in the fuselage under the engine?
Well you have one on the bottom of the fuselage,
You need a spanner to open it and in reality it is a maintenance drain not a water drain.
Oh, i just drain it everytime just with my normal fuel drainer, are you sure we are talking about the same one ?