Galley Tank 3400RL

[bw2]

I have not looked at that specific tank but the black and gray tanks drain from the side of the tank, so this would mean the pipe is extending from the left side of the tank as you stand looking at the RV from the working side of the RV (front toward the left). The pipe on my 3400 looks to be 11/2" pipe and not the 4" sewer pipe.